31122200223121 has 24 divisors (see below), whose sum is σ = 38120219998080. Its totient is φ = 25264600335072.

The previous prime is 31122200223019. The next prime is 31122200223181. The reversal of 31122200223121 is 12132200222113.

It is a de Polignac number, because none of the positive numbers 2^k-31122200223121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31122200223092 and 31122200223101.

It is not an unprimeable number, because it can be changed into a prime (31122200223181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1887486 + ... + 8112151.

It is an arithmetic number, because the mean of its divisors is an integer number (1588342499920).

Almost surely, 2^{31122200223121} is an apocalyptic number.

It is an amenable number.

31122200223121 is a deficient number, since it is larger than the sum of its proper divisors (6998019774959).

31122200223121 is a wasteful number, since it uses less digits than its factorization.

31122200223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003013 (or 10003006 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31122200223121 its reverse (12132200222113), we get a palindrome (43254400445234).

The spelling of 31122200223121 in words is "thirty-one trillion, one hundred twenty-two billion, two hundred million, two hundred twenty-three thousand, one hundred twenty-one".