231223120123231 has 4 divisors (see below), whose sum is σ = 231682808235312. Its totient is φ = 230763432011152.

The previous prime is 231223120123153. The next prime is 231223120123309. The reversal of 231223120123231 is 132321021322132.

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

It is an interprime number because it is at equal distance from previous prime (231223120123153) and next prime (231223120123309).

It is a cyclic number.

It is not a de Polignac number, because 231223120123231 - 2³⁵ = 231188760384863 is a prime.

It is a super-2 number, since 2×231223120123231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231223120123231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231223120126231) 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, 229844055286 + ... + 229844056291.

It is an arithmetic number, because the mean of its divisors is an integer number (57920702058828).

Almost surely, 2^{231223120123231} is an apocalyptic number.

231223120123231 is a deficient number, since it is larger than the sum of its proper divisors (459688112081).

231223120123231 is an equidigital number, since it uses as much as digits as its factorization.

231223120123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459688112080.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 231223120123231 its reverse (132321021322132), we get a palindrome (363544141445363).

The spelling of 231223120123231 in words is "two hundred thirty-one trillion, two hundred twenty-three billion, one hundred twenty million, one hundred twenty-three thousand, two hundred thirty-one".