31201221232 has 10 divisors (see below), whose sum is σ = 60452366168. Its totient is φ = 15600610608.

The previous prime is 31201221221. The next prime is 31201221257. The reversal of 31201221232 is 23212210213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975038148 + ... + 975038179.

Almost surely, 2^31201221232 is an apocalyptic number.

It is an amenable number.

31201221232 is a deficient number, since it is larger than the sum of its proper divisors (29251144936).

31201221232 is a wasteful number, since it uses less digits than its factorization.

31201221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950076335 (or 1950076329 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31201221232 its reverse (23212210213), we get a palindrome (54413431445).

The spelling of 31201221232 in words is "thirty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred thirty-two".