31012332123 has 4 divisors (see below), whose sum is σ = 41349776168. Its totient is φ = 20674888080.

The previous prime is 31012332103. The next prime is 31012332137. The reversal of 31012332123 is 32123321013.

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

It is not a de Polignac number, because 31012332123 - 2²⁵ = 30978777691 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 31012332123.

It is not an unprimeable number, because it can be changed into a prime (31012332103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5168722018 + ... + 5168722023.

It is an arithmetic number, because the mean of its divisors is an integer number (10337444042).

Almost surely, 2^31012332123 is an apocalyptic number.

31012332123 is a deficient number, since it is larger than the sum of its proper divisors (10337444045).

31012332123 is a wasteful number, since it uses less digits than its factorization.

31012332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337444044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31012332123 its reverse (32123321013), we get a palindrome (63135653136).

The spelling of 31012332123 in words is "thirty-one billion, twelve million, three hundred thirty-two thousand, one hundred twenty-three".