123000031131 has 8 divisors (see below), whose sum is σ = 172631622720. Its totient is φ = 77684230152.

The previous prime is 123000031127. The next prime is 123000031139. The reversal of 123000031131 is 131130000321.

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

It is not a de Polignac number, because 123000031131 - 2² = 123000031127 is a prime.

It is a super-2 number, since 2×123000031131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123000031131.

It is not an unprimeable number, because it can be changed into a prime (123000031139) 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, 1078947585 + ... + 1078947698.

It is an arithmetic number, because the mean of its divisors is an integer number (21578952840).

Almost surely, 2^123000031131 is an apocalyptic number.

123000031131 is a deficient number, since it is larger than the sum of its proper divisors (49631591589).

123000031131 is a wasteful number, since it uses less digits than its factorization.

123000031131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157895305.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 123000031131 its reverse (131130000321), we get a palindrome (254130031452).

The spelling of 123000031131 in words is "one hundred twenty-three billion, thirty-one thousand, one hundred thirty-one".