31033032123 has 4 divisors (see below), whose sum is σ = 41377376168. Its totient is φ = 20688688080.

The previous prime is 31033032083. The next prime is 31033032127. The reversal of 31033032123 is 32123033013.

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

It is not a de Polignac number, because 31033032123 - 2²¹ = 31030934971 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 31033032123.

It is not an unprimeable number, because it can be changed into a prime (31033032127) 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, 5172172018 + ... + 5172172023.

It is an arithmetic number, because the mean of its divisors is an integer number (10344344042).

Almost surely, 2^31033032123 is an apocalyptic number.

31033032123 is a deficient number, since it is larger than the sum of its proper divisors (10344344045).

31033032123 is a wasteful number, since it uses less digits than its factorization.

31033032123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344344044.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31033032123 its reverse (32123033013), we get a palindrome (63156065136).

The spelling of 31033032123 in words is "thirty-one billion, thirty-three million, thirty-two thousand, one hundred twenty-three".