231020121123313 has 4 divisors (see below), whose sum is σ = 231045126016320. Its totient is φ = 230995116230308.

The previous prime is 231020121123287. The next prime is 231020121123349. The reversal of 231020121123313 is 313321121020132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231020121123313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231020121123373) 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, 12502432645 + ... + 12502451122.

It is an arithmetic number, because the mean of its divisors is an integer number (57761281504080).

Almost surely, 2^{231020121123313} is an apocalyptic number.

It is an amenable number.

231020121123313 is a deficient number, since it is larger than the sum of its proper divisors (25004893007).

231020121123313 is an equidigital number, since it uses as much as digits as its factorization.

231020121123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004893006.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 231020121123313 its reverse (313321121020132), we get a palindrome (544341242143445).

The spelling of 231020121123313 in words is "two hundred thirty-one trillion, twenty billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred thirteen".