21312321032 has 32 divisors (see below), whose sum is σ = 40713019200. Its totient is φ = 10456353600.

The previous prime is 21312321013. The next prime is 21312321059. The reversal of 21312321032 is 23012321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312320995 and 21312321013.

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, 152357 + ... + 256587.

It is an arithmetic number, because the mean of its divisors is an integer number (1272281850).

Almost surely, 2^21312321032 is an apocalyptic number.

It is an amenable number.

21312321032 is a deficient number, since it is larger than the sum of its proper divisors (19400698168).

21312321032 is a wasteful number, since it uses less digits than its factorization.

21312321032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104717 (or 104713 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21312321032 its reverse (23012321312), we get a palindrome (44324642344).

The spelling of 21312321032 in words is "twenty-one billion, three hundred twelve million, three hundred twenty-one thousand, thirty-two".