31212110212 has 12 divisors (see below), whose sum is σ = 54632067840. Its totient is φ = 15602947976.

The previous prime is 31212110207. The next prime is 31212110261. The reversal of 31212110212 is 21201121213.

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, 754108 + ... + 794419.

It is an arithmetic number, because the mean of its divisors is an integer number (4552672320).

Almost surely, 2^31212110212 is an apocalyptic number.

It is an amenable number.

31212110212 is a deficient number, since it is larger than the sum of its proper divisors (23419957628).

31212110212 is a wasteful number, since it uses less digits than its factorization.

31212110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553570 (or 1553568 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31212110212 its reverse (21201121213), we get a palindrome (52413231425).

The spelling of 31212110212 in words is "thirty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twelve".