31021212113212 has 12 divisors (see below), whose sum is σ = 54785168182360. Its totient is φ = 15368306918256.

The previous prime is 31021212113197. The next prime is 31021212113233. The reversal of 31021212113212 is 21231121212013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35574784098 + ... + 35574784969.

Almost surely, 2^{31021212113212} is an apocalyptic number.

It is an amenable number.

31021212113212 is a deficient number, since it is larger than the sum of its proper divisors (23763956069148).

31021212113212 is a wasteful number, since it uses less digits than its factorization.

31021212113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71149569180 (or 71149569178 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31021212113212 its reverse (21231121212013), we get a palindrome (52252333325225).

The spelling of 31021212113212 in words is "thirty-one trillion, twenty-one billion, two hundred twelve million, one hundred thirteen thousand, two hundred twelve".