31211222112212 has 24 divisors (see below), whose sum is σ = 55217270428320. Its totient is φ = 15435360609120.

The previous prime is 31211222112157. The next prime is 31211222112221. The reversal of 31211222112212 is 21221122211213.

It is a congruent number.

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, 62435258 + ... + 62933169.

It is an arithmetic number, because the mean of its divisors is an integer number (2300719601180).

Almost surely, 2^{31211222112212} is an apocalyptic number.

It is an amenable number.

31211222112212 is a deficient number, since it is larger than the sum of its proper divisors (24006048316108).

31211222112212 is a wasteful number, since it uses less digits than its factorization.

31211222112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125369111 (or 125369109 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

Adding to 31211222112212 its reverse (21221122211213), we get a palindrome (52432344323425).

Subtracting from 31211222112212 its reverse (21221122211213), we obtain a palindrome (9990099900999).

The spelling of 31211222112212 in words is "thirty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twelve".