| Base | Representation |
|---|---|
| bin | 11101010001000110000… |
| … | …111010000001100111100 |
| 3 | 21010021022110010202121110 |
| 4 | 131101012013100030330 |
| 5 | 230422440034013040 |
| 6 | 4135535302002020 |
| 7 | 265206634303530 |
| oct | 35210607201474 |
| 9 | 7107273122543 |
| 10 | 2011221001020 |
| 11 | 705a54905a50 |
| 12 | 285955a16310 |
| 13 | 1178711b9c4a |
| 14 | 6d4b4c4bbc0 |
| 15 | 374b3173980 |
| hex | 1d4461d033c |
2011221001020 has 192 divisors, whose sum is σ = 7056632411136. Its totient is φ = 415794462720.
The previous prime is 2011221001007. The next prime is 2011221001033. The reversal of 2011221001020 is 201001221102.
It is an interprime number because it is at equal distance from previous prime (2011221001007) and next prime (2011221001033).
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a junction number, because it is equal to n+sod(n) for n = 2011221000987 and 2011221001005.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 194757 + ... + 2015036.
It is an arithmetic number, because the mean of its divisors is an integer number (36753293808).
Almost surely, 22011221001020 is an apocalyptic number.
2011221001020 is a gapful number since it is divisible by the number (20) 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 2011221001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3528316205568).
2011221001020 is an abundant number, since it is smaller than the sum of its proper divisors (5045411410116).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2011221001020 is a wasteful number, since it uses less digits than its factorization.
2011221001020 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2210020 (or 2210018 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 2011221001020 its reverse (201001221102), we get a palindrome (2212222222122).
It can be divided in two parts, 201 and 1221001020, that added together give a palindrome (1221001221).
The spelling of 2011221001020 in words is "two trillion, eleven billion, two hundred twenty-one million, one thousand, twenty".
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