21113200102021 has 16 divisors (see below), whose sum is σ = 22042289168640. Its totient is φ = 20185040494080.

The previous prime is 21113200102013. The next prime is 21113200102073. The reversal of 21113200102021 is 12020100231112.

It is a cyclic number.

It is not a de Polignac number, because 21113200102021 - 2³ = 21113200102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21113200101986 and 21113200102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113200102321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452437936 + ... + 452484598.

It is an arithmetic number, because the mean of its divisors is an integer number (1377643073040).

Almost surely, 2^{21113200102021} is an apocalyptic number.

It is an amenable number.

21113200102021 is a deficient number, since it is larger than the sum of its proper divisors (929089066619).

21113200102021 is a wasteful number, since it uses less digits than its factorization.

21113200102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56196.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21113200102021 its reverse (12020100231112), we get a palindrome (33133300333133).

The spelling of 21113200102021 in words is "twenty-one trillion, one hundred thirteen billion, two hundred million, one hundred two thousand, twenty-one".