231021112021311 has 4 divisors (see below), whose sum is σ = 308028149361752. Its totient is φ = 154014074680872.

The previous prime is 231021112021201. The next prime is 231021112021313. The reversal of 231021112021311 is 113120211120132.

231021112021311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 231021112021311 - 2¹⁰ = 231021112020287 is a prime.

It is a super-2 number, since 2×231021112021311² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021112021313) 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, 38503518670216 + ... + 38503518670221.

It is an arithmetic number, because the mean of its divisors is an integer number (77007037340438).

Almost surely, 2^{231021112021311} is an apocalyptic number.

231021112021311 is a deficient number, since it is larger than the sum of its proper divisors (77007037340441).

231021112021311 is an equidigital number, since it uses as much as digits as its factorization.

231021112021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77007037340440.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 231021112021311 its reverse (113120211120132), we get a palindrome (344141323141443).

The spelling of 231021112021311 in words is "two hundred thirty-one trillion, twenty-one billion, one hundred twelve million, twenty-one thousand, three hundred eleven".