31321122212 has 48 divisors (see below), whose sum is σ = 56111466432. Its totient is φ = 15293836800.

The previous prime is 31321122187. The next prime is 31321122233. The reversal of 31321122212 is 21222112313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26253488 + ... + 26254680.

It is an arithmetic number, because the mean of its divisors is an integer number (1168988884).

Almost surely, 2^31321122212 is an apocalyptic number.

It is an amenable number.

31321122212 is a deficient number, since it is larger than the sum of its proper divisors (24790344220).

31321122212 is a wasteful number, since it uses less digits than its factorization.

31321122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2026 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 31321122212 its reverse (21222112313), we get a palindrome (52543234525).

The spelling of 31321122212 in words is "thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".