231121233221023 has 4 divisors (see below), whose sum is σ = 232593342986920. Its totient is φ = 229649123455128.

The previous prime is 231121233220987. The next prime is 231121233221069. The reversal of 231121233221023 is 320122332121132.

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 231121233221023 - 2²⁹ = 231120696350111 is a prime.

It is a super-2 number, since 2×231121233221023² (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 = 231121233220982 and 231121233221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121203221023) 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, 736054882713 + ... + 736054883026.

It is an arithmetic number, because the mean of its divisors is an integer number (58148335746730).

Almost surely, 2^{231121233221023} is an apocalyptic number.

231121233221023 is a deficient number, since it is larger than the sum of its proper divisors (1472109765897).

231121233221023 is a wasteful number, since it uses less digits than its factorization.

231121233221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472109765896.

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

Adding to 231121233221023 its reverse (320122332121132), we get a palindrome (551243565342155).

The spelling of 231121233221023 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, two hundred thirty-three million, two hundred twenty-one thousand, twenty-three".