21013000022 has 48 divisors (see below), whose sum is σ = 36738461088. Its totient is φ = 8829849600.

The previous prime is 21013000009. The next prime is 21013000033. The reversal of 21013000022 is 22000031012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012999967 and 21013000012.

It is a congruent number.

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, 16150772 + ... + 16152072.

It is an arithmetic number, because the mean of its divisors is an integer number (765384606).

Almost surely, 2^21013000022 is an apocalyptic number.

21013000022 is a deficient number, since it is larger than the sum of its proper divisors (15725461066).

21013000022 is a wasteful number, since it uses less digits than its factorization.

21013000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21013000022 its reverse (22000031012), we get a palindrome (43013031034).

The spelling of 21013000022 in words is "twenty-one billion, thirteen million, twenty-two", and thus it is an aban number and an uban number.