13123232031 has 32 divisors (see below), whose sum is σ = 21573142528. Its totient is φ = 6910064640.

The previous prime is 13123231993. The next prime is 13123232033. The reversal of 13123232031 is 13023232131.

It is not a de Polignac number, because 13123232031 - 2⁶ = 13123231967 is a prime.

It is a super-2 number, since 2×13123232031² (a number of 21 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 = 13123231989 and 13123232007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123232033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115866 + ... + 199176.

It is an arithmetic number, because the mean of its divisors is an integer number (674160704).

Almost surely, 2^13123232031 is an apocalyptic number.

13123232031 is a deficient number, since it is larger than the sum of its proper divisors (8449910497).

13123232031 is a wasteful number, since it uses less digits than its factorization.

13123232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83911.

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

Adding to 13123232031 its reverse (13023232131), we get a palindrome (26146464162).

The spelling of 13123232031 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-two thousand, thirty-one".