123152431013 has 4 divisors (see below), whose sum is σ = 123268285728. Its totient is φ = 123036576300.

The previous prime is 123152431009. The next prime is 123152431049. The reversal of 123152431013 is 310134251321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310134251321 = 8539 ⋅36319739.

It is a cyclic number.

It is not a de Polignac number, because 123152431013 - 2² = 123152431009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123152431063) 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, 57925763 + ... + 57927888.

It is an arithmetic number, because the mean of its divisors is an integer number (30817071432).

Almost surely, 2^123152431013 is an apocalyptic number.

It is an amenable number.

123152431013 is a deficient number, since it is larger than the sum of its proper divisors (115854715).

123152431013 is a wasteful number, since it uses less digits than its factorization.

123152431013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115854714.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 123152431013 its reverse (310134251321), we get a palindrome (433286682334).

The spelling of 123152431013 in words is "one hundred twenty-three billion, one hundred fifty-two million, four hundred thirty-one thousand, thirteen".