13123231001 has 2 divisors, whose sum is σ = 13123231002. Its totient is φ = 13123231000.

The previous prime is 13123230997. The next prime is 13123231021. The reversal of 13123231001 is 10013232131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12215775625 + 907455376 = 110525^2 + 30124^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123231001 - 2² = 13123230997 is a prime.

It is a super-3 number, since 3×13123231001³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13123231021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561615500 + 6561615501.

It is an arithmetic number, because the mean of its divisors is an integer number (6561615501).

Almost surely, 2^13123231001 is an apocalyptic number.

It is an amenable number.

13123231001 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123231001 is an equidigital number, since it uses as much as digits as its factorization.

13123231001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13123231001 its reverse (10013232131), we get a palindrome (23136463132).

The spelling of 13123231001 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-one thousand, one".