31121010022 has 16 divisors (see below), whose sum is σ = 47108022192. Its totient is φ = 15418690560.

The previous prime is 31121009987. The next prime is 31121010031. The reversal of 31121010022 is 22001012113.

It is a junction number, because it is equal to n+sod(n) for n = 31121009984 and 31121010011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88078 + ... + 264574.

It is an arithmetic number, because the mean of its divisors is an integer number (2944251387).

Almost surely, 2^31121010022 is an apocalyptic number.

31121010022 is a deficient number, since it is larger than the sum of its proper divisors (15987012170).

31121010022 is a wasteful number, since it uses less digits than its factorization.

31121010022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177303.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31121010022 its reverse (22001012113), we get a palindrome (53122022135).

The spelling of 31121010022 in words is "thirty-one billion, one hundred twenty-one million, ten thousand, twenty-two".