21013110212100 has 72 divisors (see below), whose sum is σ = 61005433944000. Its totient is φ = 5584371473280.

The previous prime is 21013110212089. The next prime is 21013110212119. The reversal of 21013110212100 is 121201131012.

It is a super-2 number, since 2×21013110212100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21013110212100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119440600 + ... + 119616399.

Almost surely, 2^{21013110212100} is an apocalyptic number.

21013110212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013110212100 is an abundant number, since it is smaller than the sum of its proper divisors (39992323731900).

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

21013110212100 is a wasteful number, since it uses less digits than its factorization.

21013110212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239057309 (or 239057302 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21013110212100 its reverse (121201131012), we get a palindrome (21134311343112).

The spelling of 21013110212100 in words is "twenty-one trillion, thirteen billion, one hundred ten million, two hundred twelve thousand, one hundred".