231013321001231 has 4 divisors (see below), whose sum is σ = 234800424624264. Its totient is φ = 227226217378200.

The previous prime is 231013321001209. The next prime is 231013321001237. The reversal of 231013321001231 is 132100123310132.

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

It is a cyclic number.

It is not a de Polignac number, because 231013321001231 - 2²⁶ = 231013253892367 is a prime.

It is a super-2 number, since 2×231013321001231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231013321001197 and 231013321001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231013321001237) 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, 1893551811425 + ... + 1893551811546.

It is an arithmetic number, because the mean of its divisors is an integer number (58700106156066).

Almost surely, 2^{231013321001231} is an apocalyptic number.

231013321001231 is a deficient number, since it is larger than the sum of its proper divisors (3787103623033).

231013321001231 is an equidigital number, since it uses as much as digits as its factorization.

231013321001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787103623032.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 231013321001231 its reverse (132100123310132), we get a palindrome (363113444311363).

The spelling of 231013321001231 in words is "two hundred thirty-one trillion, thirteen billion, three hundred twenty-one million, one thousand, two hundred thirty-one".