31201322312 has 16 divisors (see below), whose sum is σ = 58509488700. Its totient is φ = 15598792000.

The previous prime is 31201322311. The next prime is 31201322333. The reversal of 31201322312 is 21322310213.

It can be written as a sum of positive squares in 2 ways, for example, as 26229098116 + 4972224196 = 161954^2 + 70514^2 .

It is not an unprimeable number, because it can be changed into a prime (31201322311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161387 + ... + 297402.

Almost surely, 2^31201322312 is an apocalyptic number.

It is an amenable number.

31201322312 is a deficient number, since it is larger than the sum of its proper divisors (27308166388).

31201322312 is a wasteful number, since it uses less digits than its factorization.

31201322312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467296 (or 467292 counting only the distinct ones).

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

Adding to 31201322312 its reverse (21322310213), we get a palindrome (52523632525).

The spelling of 31201322312 in words is "thirty-one billion, two hundred one million, three hundred twenty-two thousand, three hundred twelve".