31110012021121 has 16 divisors (see below), whose sum is σ = 34090790371200. Its totient is φ = 28154829404800.

The previous prime is 31110012021113. The next prime is 31110012021169. The reversal of 31110012021121 is 12112021001113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31110012021121 - 2³ = 31110012021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31110012021095 and 31110012021104.

It is not an unprimeable number, because it can be changed into a prime (31110012021721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264085 + ... + 7892386.

It is an arithmetic number, because the mean of its divisors is an integer number (2130674398200).

Almost surely, 2^{31110012021121} is an apocalyptic number.

It is an amenable number.

31110012021121 is a deficient number, since it is larger than the sum of its proper divisors (2980778350079).

31110012021121 is a wasteful number, since it uses less digits than its factorization.

31110012021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158040.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 31110012021121 its reverse (12112021001113), we get a palindrome (43222033022234).

The spelling of 31110012021121 in words is "thirty-one trillion, one hundred ten billion, twelve million, twenty-one thousand, one hundred twenty-one".