31110220231121 has 4 divisors (see below), whose sum is σ = 31833713724912. Its totient is φ = 30386726737332.

The previous prime is 31110220231067. The next prime is 31110220231157. The reversal of 31110220231121 is 12113202201113.

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 31110220231121 - 2²² = 31110216036817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31110220231093 and 31110220231102.

It is not an unprimeable number, because it can be changed into a prime (31110220201121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361746746831 + ... + 361746746916.

It is an arithmetic number, because the mean of its divisors is an integer number (7958428431228).

Almost surely, 2^{31110220231121} is an apocalyptic number.

It is an amenable number.

31110220231121 is a deficient number, since it is larger than the sum of its proper divisors (723493493791).

31110220231121 is an equidigital number, since it uses as much as digits as its factorization.

31110220231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723493493790.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31110220231121 its reverse (12113202201113), we get a palindrome (43223422432234).

The spelling of 31110220231121 in words is "thirty-one trillion, one hundred ten billion, two hundred twenty million, two hundred thirty-one thousand, one hundred twenty-one".