31122310123 has 4 divisors (see below), whose sum is σ = 31123820200. Its totient is φ = 31120800048.

The previous prime is 31122310081. The next prime is 31122310133. The reversal of 31122310123 is 32101322113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32101322113 = 7 ⋅4585903159.

It is a cyclic number.

It is not a de Polignac number, because 31122310123 - 2³³ = 22532375531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31122310123.

It is not an unprimeable number, because it can be changed into a prime (31122310133) 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, 723690 + ... + 765487.

It is an arithmetic number, because the mean of its divisors is an integer number (7780955050).

Almost surely, 2^31122310123 is an apocalyptic number.

31122310123 is a deficient number, since it is larger than the sum of its proper divisors (1510077).

31122310123 is a wasteful number, since it uses less digits than its factorization.

31122310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510076.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31122310123 its reverse (32101322113), we get a palindrome (63223632236).

The spelling of 31122310123 in words is "thirty-one billion, one hundred twenty-two million, three hundred ten thousand, one hundred twenty-three".