231213302123121 has 24 divisors (see below), whose sum is σ = 341890663061376. Its totient is φ = 150491838863520.

The previous prime is 231213302123053. The next prime is 231213302123131. The reversal of 231213302123121 is 121321203312132.

231213302123121 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 1 + 330 + 2 + 12 + 312 + 1 = 666.

It is not a de Polignac number, because 231213302123121 - 2²³ = 231213293734513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231213302123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129389625 + ... + 131164406.

It is an arithmetic number, because the mean of its divisors is an integer number (14245444294224).

Almost surely, 2^{231213302123121} is an apocalyptic number.

It is an amenable number.

231213302123121 is a deficient number, since it is larger than the sum of its proper divisors (110677360938255).

231213302123121 is a wasteful number, since it uses less digits than its factorization.

231213302123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260556373 (or 260556370 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 231213302123121 its reverse (121321203312132), we get a palindrome (352534505435253).

The spelling of 231213302123121 in words is "two hundred thirty-one trillion, two hundred thirteen billion, three hundred two million, one hundred twenty-three thousand, one hundred twenty-one".