123013023231 has 16 divisors (see below), whose sum is σ = 187493001984. Its totient is φ = 70276436544.

The previous prime is 123013023229. The next prime is 123013023251. The reversal of 123013023231 is 132320310321.

It is not a de Polignac number, because 123013023231 - 2¹ = 123013023229 is a prime.

It is a super-2 number, since 2×123013023231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 123013023198 and 123013023207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013023251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605985 + ... + 783098.

It is an arithmetic number, because the mean of its divisors is an integer number (11718312624).

Almost surely, 2^123013023231 is an apocalyptic number.

123013023231 is a deficient number, since it is larger than the sum of its proper divisors (64479978753).

123013023231 is a wasteful number, since it uses less digits than its factorization.

123013023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393310.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123013023231 its reverse (132320310321), we get a palindrome (255333333552).

The spelling of 123013023231 in words is "one hundred twenty-three billion, thirteen million, twenty-three thousand, two hundred thirty-one".