31120211313121 has 32 divisors (see below), whose sum is σ = 36606173120000. Its totient is φ = 26444170823616.

The previous prime is 31120211313119. The next prime is 31120211313167. The reversal of 31120211313121 is 12131311202113.

It is not a de Polignac number, because 31120211313121 - 2¹ = 31120211313119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31120211313092 and 31120211313101.

It is not an unprimeable number, because it can be changed into a prime (31120211313421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22982395 + ... + 24298783.

It is an arithmetic number, because the mean of its divisors is an integer number (1143942910000).

Almost surely, 2^{31120211313121} is an apocalyptic number.

It is an amenable number.

31120211313121 is a deficient number, since it is larger than the sum of its proper divisors (5485961806879).

31120211313121 is a wasteful number, since it uses less digits than its factorization.

31120211313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317006 (or 1316992 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31120211313121 its reverse (12131311202113), we get a palindrome (43251522515234).

The spelling of 31120211313121 in words is "thirty-one trillion, one hundred twenty billion, two hundred eleven million, three hundred thirteen thousand, one hundred twenty-one".