31031103331123 has 32 divisors (see below), whose sum is σ = 37033079592960. Its totient is φ = 25423063522560.

The previous prime is 31031103331051. The next prime is 31031103331159. The reversal of 31031103331123 is 32113330113013.

It is a cyclic number.

It is not a de Polignac number, because 31031103331123 - 2²¹ = 31031101233971 is a prime.

It is a super-2 number, since 2×31031103331123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31031103337123) 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, 2771370961 + ... + 2771382157.

It is an arithmetic number, because the mean of its divisors is an integer number (1157283737280).

Almost surely, 2^{31031103331123} is an apocalyptic number.

31031103331123 is a deficient number, since it is larger than the sum of its proper divisors (6001976261837).

31031103331123 is a wasteful number, since it uses less digits than its factorization.

31031103331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22267.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31031103331123 its reverse (32113330113013), we get a palindrome (63144433444136).

The spelling of 31031103331123 in words is "thirty-one trillion, thirty-one billion, one hundred three million, three hundred thirty-one thousand, one hundred twenty-three".