123131320031 has 8 divisors (see below), whose sum is σ = 124542534144. Its totient is φ = 121727007360.

The previous prime is 123131319989. The next prime is 123131320043. The reversal of 123131320031 is 130023131321.

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 123131320031 - 2²² = 123127125727 is a prime.

It is a super-2 number, since 2×123131320031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123131319985 and 123131320012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131320051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689470 + ... + 1760843.

It is an arithmetic number, because the mean of its divisors is an integer number (15567816768).

Almost surely, 2^123131320031 is an apocalyptic number.

123131320031 is a deficient number, since it is larger than the sum of its proper divisors (1411214113).

123131320031 is a wasteful number, since it uses less digits than its factorization.

123131320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450721.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123131320031 its reverse (130023131321), we get a palindrome (253154451352).

The spelling of 123131320031 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred twenty thousand, thirty-one".