31212203312 has 10 divisors (see below), whose sum is σ = 60473643948. Its totient is φ = 15606101648.

The previous prime is 31212203273. The next prime is 31212203353. The reversal of 31212203312 is 21330221213.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975381338 + ... + 975381369.

Almost surely, 2^31212203312 is an apocalyptic number.

It is an amenable number.

31212203312 is a deficient number, since it is larger than the sum of its proper divisors (29261440636).

31212203312 is a wasteful number, since it uses less digits than its factorization.

31212203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950762715 (or 1950762709 counting only the distinct ones).

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

Adding to 31212203312 its reverse (21330221213), we get a palindrome (52542424525).

The spelling of 31212203312 in words is "thirty-one billion, two hundred twelve million, two hundred three thousand, three hundred twelve".