31322320123 has 4 divisors (see below), whose sum is σ = 33164809560. Its totient is φ = 29479830688.

The previous prime is 31322320111. The next prime is 31322320129. The reversal of 31322320123 is 32102322313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31322320123 - 2⁵ = 31322320091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322320094 and 31322320103.

It is not an unprimeable number, because it can be changed into a prime (31322320129) 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, 921244693 + ... + 921244726.

It is an arithmetic number, because the mean of its divisors is an integer number (8291202390).

Almost surely, 2^31322320123 is an apocalyptic number.

31322320123 is a deficient number, since it is larger than the sum of its proper divisors (1842489437).

31322320123 is a wasteful number, since it uses less digits than its factorization.

31322320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842489436.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31322320123 its reverse (32102322313), we get a palindrome (63424642436).

The spelling of 31322320123 in words is "thirty-one billion, three hundred twenty-two million, three hundred twenty thousand, one hundred twenty-three".