231001233123013 has 4 divisors (see below), whose sum is σ = 234788138584108. Its totient is φ = 227214327661920.

The previous prime is 231001233122981. The next prime is 231001233123079. The reversal of 231001233123013 is 310321332100132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65220209265409 + 165781023857604 = 8075903^2 + 12875598^2 .

It is a cyclic number.

It is not a de Polignac number, because 231001233123013 - 2⁵ = 231001233122981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231001273123013) 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, 1893452730456 + ... + 1893452730577.

It is an arithmetic number, because the mean of its divisors is an integer number (58697034646027).

Almost surely, 2^{231001233123013} is an apocalyptic number.

It is an amenable number.

231001233123013 is a deficient number, since it is larger than the sum of its proper divisors (3786905461095).

231001233123013 is an equidigital number, since it uses as much as digits as its factorization.

231001233123013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786905461094.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 231001233123013 its reverse (310321332100132), we get a palindrome (541322565223145).

The spelling of 231001233123013 in words is "two hundred thirty-one trillion, one billion, two hundred thirty-three million, one hundred twenty-three thousand, thirteen".