Base | Representation |
---|---|
bin | 1001100110101101001001… |
… | …11011010111111001000100 |
3 | 2202210011022020211112100211 |
4 | 10303112210323113321010 |
5 | 10232022024013102322 |
6 | 112530524212445204 |
7 | 4306644034125514 |
oct | 463264473277104 |
9 | 82704266745324 |
10 | 21121121222212 |
11 | 6803465337980 |
12 | 24514b8919804 |
13 | ba2936b3811b |
14 | 5303a68b1844 |
15 | 26961ec2bb77 |
hex | 1335a4ed7e44 |
21121121222212 has 12 divisors (see below), whose sum is σ = 40322140515216. Its totient is φ = 9600509646440.
The previous prime is 21121121222207. The next prime is 21121121222261. The reversal of 21121121222212 is 21222212112112.
It is a super-2 number, since 2×211211212222122 (a number of 27 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (22).
It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240012741118 + ... + 240012741205.
It is an arithmetic number, because the mean of its divisors is an integer number (3360178376268).
Almost surely, 221121121222212 is an apocalyptic number.
21121121222212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is an amenable number.
21121121222212 is a deficient number, since it is larger than the sum of its proper divisors (19201019293004).
21121121222212 is a wasteful number, since it uses less digits than its factorization.
21121121222212 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 480025482338 (or 480025482336 counting only the distinct ones).
The product of its digits is 256, while the sum is 22.
Adding to 21121121222212 its reverse (21222212112112), we get a palindrome (42343333334324).
The spelling of 21121121222212 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".
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