31212100112 has 20 divisors (see below), whose sum is σ = 60596623056. Its totient is φ = 15574261920.

The previous prime is 31212100111. The next prime is 31212100121. The reversal of 31212100112 is 21100121213.

It is not an unprimeable number, because it can be changed into a prime (31212100111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1978658 + ... + 1994369.

Almost surely, 2^31212100112 is an apocalyptic number.

It is an amenable number.

31212100112 is a deficient number, since it is larger than the sum of its proper divisors (29384522944).

31212100112 is a wasteful number, since it uses less digits than its factorization.

31212100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973526 (or 3973520 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 31212100112 its reverse (21100121213), we get a palindrome (52312221325).

The spelling of 31212100112 in words is "thirty-one billion, two hundred twelve million, one hundred thousand, one hundred twelve".