21230332012 has 24 divisors (see below), whose sum is σ = 37382023952. Its totient is φ = 10549828800.

The previous prime is 21230331979. The next prime is 21230332027. The reversal of 21230332012 is 21023303212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252063 + ... + 1268905.

Almost surely, 2^21230332012 is an apocalyptic number.

It is an amenable number.

21230332012 is a deficient number, since it is larger than the sum of its proper divisors (16151691940).

21230332012 is a wasteful number, since it uses less digits than its factorization.

21230332012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18769 (or 18767 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21230332012 its reverse (21023303212), we get a palindrome (42253635224).

The spelling of 21230332012 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, twelve".