231021023113 has 4 divisors (see below), whose sum is σ = 231269701140. Its totient is φ = 230772345088.

The previous prime is 231021023083. The next prime is 231021023147. The reversal of 231021023113 is 311320120132.

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 11437874704 + 219583148409 = 106948^2 + 468597^2 .

It is a cyclic number.

It is not a de Polignac number, because 231021023113 - 2²⁹ = 230484152201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231021023413) 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, 124337620 + ... + 124339477.

It is an arithmetic number, because the mean of its divisors is an integer number (57817425285).

Almost surely, 2^231021023113 is an apocalyptic number.

It is an amenable number.

231021023113 is a deficient number, since it is larger than the sum of its proper divisors (248678027).

231021023113 is an equidigital number, since it uses as much as digits as its factorization.

231021023113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248678026.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231021023113 its reverse (311320120132), we get a palindrome (542341143245).

The spelling of 231021023113 in words is "two hundred thirty-one billion, twenty-one million, twenty-three thousand, one hundred thirteen".