31221230332 has 72 divisors (see below), whose sum is σ = 57798105792. Its totient is φ = 14745628800.

The previous prime is 31221230329. The next prime is 31221230347. The reversal of 31221230332 is 23303212213.

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, 74159482 + ... + 74159902.

Almost surely, 2^31221230332 is an apocalyptic number.

It is an amenable number.

31221230332 is a deficient number, since it is larger than the sum of its proper divisors (26576875460).

31221230332 is a wasteful number, since it uses less digits than its factorization.

31221230332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31221230332 its reverse (23303212213), we get a palindrome (54524442545).

The spelling of 31221230332 in words is "thirty-one billion, two hundred twenty-one million, two hundred thirty thousand, three hundred thirty-two".