31121200122 has 16 divisors (see below), whose sum is σ = 62846696640. Its totient is φ = 10273017312.

The previous prime is 31121200109. The next prime is 31121200133. The reversal of 31121200122 is 22100212113.

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, 25178347 + ... + 25179582.

It is an arithmetic number, because the mean of its divisors is an integer number (3927918540).

Almost surely, 2^31121200122 is an apocalyptic number.

31121200122 is an abundant number, since it is smaller than the sum of its proper divisors (31725496518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31121200122 is a wasteful number, since it uses less digits than its factorization.

31121200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50358037.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31121200122 its reverse (22100212113), we get a palindrome (53221412235).

The spelling of 31121200122 in words is "thirty-one billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-two".