31213210022 has 32 divisors (see below), whose sum is σ = 48259411200. Its totient is φ = 15135068448.

The previous prime is 31213209991. The next prime is 31213210037. The reversal of 31213210022 is 22001231213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3264653 + ... + 3274199.

It is an arithmetic number, because the mean of its divisors is an integer number (1508106600).

Almost surely, 2^31213210022 is an apocalyptic number.

31213210022 is a deficient number, since it is larger than the sum of its proper divisors (17046201178).

31213210022 is a wasteful number, since it uses less digits than its factorization.

31213210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9980.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31213210022 its reverse (22001231213), we get a palindrome (53214441235).

The spelling of 31213210022 in words is "thirty-one billion, two hundred thirteen million, two hundred ten thousand, twenty-two".