31213201112 has 16 divisors (see below), whose sum is σ = 59229870840. Its totient is φ = 15418568896.

The previous prime is 31213201109. The next prime is 31213201127. The reversal of 31213201112 is 21110231213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23503253 + ... + 23504580.

Almost surely, 2^31213201112 is an apocalyptic number.

It is an amenable number.

31213201112 is a deficient number, since it is larger than the sum of its proper divisors (28016669728).

31213201112 is a wasteful number, since it uses less digits than its factorization.

31213201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47007922 (or 47007918 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31213201112 its reverse (21110231213), we get a palindrome (52323432325).

The spelling of 31213201112 in words is "thirty-one billion, two hundred thirteen million, two hundred one thousand, one hundred twelve".