21102022012 has 24 divisors (see below), whose sum is σ = 37304911280. Its totient is φ = 10443928320.

The previous prime is 21102022009. The next prime is 21102022031. The reversal of 21102022012 is 21022020112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21102021983 and 21102022001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131062 + ... + 243682.

Almost surely, 2^21102022012 is an apocalyptic number.

It is an amenable number.

21102022012 is a deficient number, since it is larger than the sum of its proper divisors (16202889268).

21102022012 is a wasteful number, since it uses less digits than its factorization.

21102022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113101 (or 113099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21102022012 its reverse (21022020112), we get a palindrome (42124042124).

The spelling of 21102022012 in words is "twenty-one billion, one hundred two million, twenty-two thousand, twelve".