31102223212 has 18 divisors (see below), whose sum is σ = 55126629348. Its totient is φ = 15354249768.

The previous prime is 31102223183. The next prime is 31102223233. The reversal of 31102223212 is 21232220113.

It is a self number, because there is not a number n which added to its sum of digits gives 31102223212.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 597978 + ... + 647905.

Almost surely, 2^31102223212 is an apocalyptic number.

It is an amenable number.

31102223212 is a deficient number, since it is larger than the sum of its proper divisors (24024406136).

31102223212 is a wasteful number, since it uses less digits than its factorization.

31102223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246045 (or 1245964 counting only the distinct ones).

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

Adding to 31102223212 its reverse (21232220113), we get a palindrome (52334443325).

The spelling of 31102223212 in words is "thirty-one billion, one hundred two million, two hundred twenty-three thousand, two hundred twelve".