31031222212 has 24 divisors (see below), whose sum is σ = 54645050880. Its totient is φ = 15418518240.

The previous prime is 31031222207. The next prime is 31031222251. The reversal of 31031222212 is 21222213013.

It is a self number, because there is not a number n which added to its sum of digits gives 31031222212.

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, 741339 + ... + 782077.

It is an arithmetic number, because the mean of its divisors is an integer number (2276877120).

Almost surely, 2^31031222212 is an apocalyptic number.

It is an amenable number.

31031222212 is a deficient number, since it is larger than the sum of its proper divisors (23613828668).

31031222212 is a wasteful number, since it uses less digits than its factorization.

31031222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41931 (or 41929 counting only the distinct ones).

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

Adding to 31031222212 its reverse (21222213013), we get a palindrome (52253435225).

The spelling of 31031222212 in words is "thirty-one billion, thirty-one million, two hundred twenty-two thousand, two hundred twelve".