31133222212 has 24 divisors (see below), whose sum is σ = 55403453952. Its totient is φ = 15303914400.

The previous prime is 31133222209. The next prime is 31133222249. The reversal of 31133222212 is 21222233113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484863 + ... + 545305.

It is an arithmetic number, because the mean of its divisors is an integer number (2308477248).

Almost surely, 2^31133222212 is an apocalyptic number.

It is an amenable number.

31133222212 is a deficient number, since it is larger than the sum of its proper divisors (24270231740).

31133222212 is a wasteful number, since it uses less digits than its factorization.

31133222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62619 (or 62617 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 31133222212 its reverse (21222233113), we get a palindrome (52355455325).

The spelling of 31133222212 in words is "thirty-one billion, one hundred thirty-three million, two hundred twenty-two thousand, two hundred twelve".