31120012220121 has 24 divisors (see below), whose sum is σ = 49039158205440. Its totient is φ = 18860012239200.

The previous prime is 31120012220113. The next prime is 31120012220149. The reversal of 31120012220121 is 12102221002113.

31120012220121 is a `hidden beast` number, since 311 + 2 + 0 + 0 + 12 + 220 + 121 = 666.

It is not a de Polignac number, because 31120012220121 - 2³ = 31120012220113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31120012220094 and 31120012220103.

It is not an unprimeable number, because it can be changed into a prime (31120012220191) 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, 1879065 + ... + 8109926.

It is an arithmetic number, because the mean of its divisors is an integer number (2043298258560).

Almost surely, 2^{31120012220121} is an apocalyptic number.

It is an amenable number.

31120012220121 is a deficient number, since it is larger than the sum of its proper divisors (17919145985319).

31120012220121 is a wasteful number, since it uses less digits than its factorization.

31120012220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020477 (or 10020474 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31120012220121 its reverse (12102221002113), we get a palindrome (43222233222234).

The spelling of 31120012220121 in words is "thirty-one trillion, one hundred twenty billion, twelve million, two hundred twenty thousand, one hundred twenty-one".