| Base | Representation |
|---|---|
| bin | 10001110001011101000… |
| … | …011111000100000001100 |
| 3 | 11022202110201122112211200 |
| 4 | 101301131003320200030 |
| 5 | 130002241443323040 |
| 6 | 2333023331345500 |
| 7 | 154144513543002 |
| oct | 21613503704014 |
| 9 | 4282421575750 |
| 10 | 1221332011020 |
| 11 | 430a67097770 |
| 12 | 178851752290 |
| 13 | 8b22bc27a34 |
| 14 | 431816a4a72 |
| 15 | 21b8286b630 |
| hex | 11c5d0f880c |
1221332011020 has 576 divisors, whose sum is σ = 4168548873216. Its totient is φ = 286972968960.
The previous prime is 1221332010979. The next prime is 1221332011037. The reversal of 1221332011020 is 201102331221.
1221332011020 is a `hidden beast` number, since 1 + 2 + 213 + 320 + 110 + 20 = 666.
It is a super-2 number, since 2×12213320110202 (a number of 25 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 1221332010984 and 1221332011002.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2116692972 + ... + 2116693548.
It is an arithmetic number, because the mean of its divisors is an integer number (7237064016).
Almost surely, 21221332011020 is an apocalyptic number.
1221332011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1221332011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084274436608).
1221332011020 is an abundant number, since it is smaller than the sum of its proper divisors (2947216862196).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1221332011020 is a wasteful number, since it uses less digits than its factorization.
1221332011020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 910 (or 905 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 18.
Adding to 1221332011020 its reverse (201102331221), we get a palindrome (1422434342241).
The spelling of 1221332011020 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, eleven thousand, twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.070 sec. • engine limits •