31122100312 has 32 divisors (see below), whose sum is σ = 59077594800. Its totient is φ = 15368206464.

The previous prime is 31122100249. The next prime is 31122100333. The reversal of 31122100312 is 21300122113.

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, 2456458 + ... + 2469094.

Almost surely, 2^31122100312 is an apocalyptic number.

It is an amenable number.

31122100312 is a deficient number, since it is larger than the sum of its proper divisors (27955494488).

31122100312 is a wasteful number, since it uses less digits than its factorization.

31122100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16435 (or 16431 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31122100312 its reverse (21300122113), we get a palindrome (52422222425).

The spelling of 31122100312 in words is "thirty-one billion, one hundred twenty-two million, one hundred thousand, three hundred twelve".