21202000112021 has 16 divisors (see below), whose sum is σ = 22640568128640. Its totient is φ = 19806587021760.

The previous prime is 21202000112011. The next prime is 21202000112063. The reversal of 21202000112021 is 12021100020212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202000112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21202000111987 and 21202000112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202000112011) 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, 9016175 + ... + 11121843.

It is an arithmetic number, because the mean of its divisors is an integer number (1415035508040).

Almost surely, 2^{21202000112021} is an apocalyptic number.

It is an amenable number.

21202000112021 is a deficient number, since it is larger than the sum of its proper divisors (1438568016619).

21202000112021 is a wasteful number, since it uses less digits than its factorization.

21202000112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115916.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202000112021 its reverse (12021100020212), we get a palindrome (33223100132233).

The spelling of 21202000112021 in words is "twenty-one trillion, two hundred two billion, one hundred twelve thousand, twenty-one".