123042512031 has 8 divisors (see below), whose sum is σ = 165063166080. Its totient is φ = 81525099672.

The previous prime is 123042511987. The next prime is 123042512081. The reversal of 123042512031 is 130215240321.

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

It is not a de Polignac number, because 123042512031 - 2²⁷ = 122908294303 is a prime.

It is a super-2 number, since 2×123042512031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123042511992 and 123042512010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042512081) 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, 125809851 + ... + 125810828.

It is an arithmetic number, because the mean of its divisors is an integer number (20632895760).

Almost surely, 2^123042512031 is an apocalyptic number.

123042512031 is a deficient number, since it is larger than the sum of its proper divisors (42020654049).

123042512031 is a wasteful number, since it uses less digits than its factorization.

123042512031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251620845.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 123042512031 its reverse (130215240321), we get a palindrome (253257752352).

The spelling of 123042512031 in words is "one hundred twenty-three billion, forty-two million, five hundred twelve thousand, thirty-one".