31122210113 has 4 divisors (see below), whose sum is σ = 31359784368. Its totient is φ = 30884635860.

The previous prime is 31122210109. The next prime is 31122210143. The reversal of 31122210113 is 31101222113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31122210113 - 2² = 31122210109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31122210091 and 31122210100.

It is not an unprimeable number, because it can be changed into a prime (31122210103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118786931 + ... + 118787192.

It is an arithmetic number, because the mean of its divisors is an integer number (7839946092).

Almost surely, 2^31122210113 is an apocalyptic number.

It is an amenable number.

31122210113 is a deficient number, since it is larger than the sum of its proper divisors (237574255).

31122210113 is a wasteful number, since it uses less digits than its factorization.

31122210113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237574254.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31122210113 its reverse (31101222113), we get a palindrome (62223432226).

The spelling of 31122210113 in words is "thirty-one billion, one hundred twenty-two million, two hundred ten thousand, one hundred thirteen".