21101211002120 has 32 divisors (see below), whose sum is σ = 47515435531200. Its totient is φ = 8433780262848.

The previous prime is 21101211002107. The next prime is 21101211002141. The reversal of 21101211002120 is 2120011210112.

It is a super-2 number, since 2×21101211002120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101211002095 and 21101211002104.

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 7 ways as a sum of consecutive naturals, for example, 209453324 + ... + 209554043.

It is an arithmetic number, because the mean of its divisors is an integer number (1484857360350).

Almost surely, 2^{21101211002120} is an apocalyptic number.

21101211002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101211002120 is an abundant number, since it is smaller than the sum of its proper divisors (26414224529080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101211002120 is a wasteful number, since it uses less digits than its factorization.

21101211002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419008637 (or 419008633 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101211002120 its reverse (2120011210112), we get a palindrome (23221222212232).

The spelling of 21101211002120 in words is "twenty-one trillion, one hundred one billion, two hundred eleven million, two thousand, one hundred twenty".