31331243123 has 8 divisors (see below), whose sum is σ = 32063672256. Its totient is φ = 30598986600.

The previous prime is 31331243113. The next prime is 31331243173. The reversal of 31331243123 is 32134213313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31331243123 - 2⁴ = 31331243107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31331243092 and 31331243101.

It is not an unprimeable number, because it can be changed into a prime (31331243113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369728 + ... + 446498.

It is an arithmetic number, because the mean of its divisors is an integer number (4007959032).

Almost surely, 2^31331243123 is an apocalyptic number.

31331243123 is a deficient number, since it is larger than the sum of its proper divisors (732429133).

31331243123 is an equidigital number, since it uses as much as digits as its factorization.

31331243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86305.

The product of its digits is 3888, while the sum is 26.

Adding to 31331243123 its reverse (32134213313), we get a palindrome (63465456436).

The spelling of 31331243123 in words is "thirty-one billion, three hundred thirty-one million, two hundred forty-three thousand, one hundred twenty-three".