31122100112 has 20 divisors (see below), whose sum is σ = 60302187660. Its totient is φ = 15560245248.

The previous prime is 31122100091. The next prime is 31122100123. The reversal of 31122100112 is 21100122113.

It can be written as a sum of positive squares in 2 ways, for example, as 20123124736 + 10998975376 = 141856^2 + 104876^2 .

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, 380564 + ... + 455052.

It is an arithmetic number, because the mean of its divisors is an integer number (3015109383).

Almost surely, 2^31122100112 is an apocalyptic number.

It is an amenable number.

31122100112 is a deficient number, since it is larger than the sum of its proper divisors (29180087548).

31122100112 is a wasteful number, since it uses less digits than its factorization.

31122100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100610 (or 100604 counting only the distinct ones).

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

Adding to 31122100112 its reverse (21100122113), we get a palindrome (52222222225).

The spelling of 31122100112 in words is "thirty-one billion, one hundred twenty-two million, one hundred thousand, one hundred twelve".