21223132112 has 80 divisors (see below), whose sum is σ = 53586070272. Its totient is φ = 7902074880.

The previous prime is 21223132109. The next prime is 21223132123. The reversal of 21223132112 is 21123132212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403964 + ... + 453467.

Almost surely, 2^21223132112 is an apocalyptic number.

It is an amenable number.

21223132112 is an abundant number, since it is smaller than the sum of its proper divisors (32362938160).

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

21223132112 is a wasteful number, since it uses less digits than its factorization.

21223132112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857476 (or 857470 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 21223132112 its reverse (21123132212), we get a palindrome (42346264324).

The spelling of 21223132112 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, one hundred twelve".