231203110442121 has 32 divisors (see below), whose sum is σ = 345222395147520. Its totient is φ = 152922034588032.

The previous prime is 231203110442113. The next prime is 231203110442131. The reversal of 231203110442121 is 121244011302132.

231203110442121 is a `hidden beast` number, since 2 + 3 + 1 + 203 + 1 + 1 + 0 + 442 + 12 + 1 = 666.

It is not a de Polignac number, because 231203110442121 - 2³ = 231203110442113 is a prime.

It is a super-2 number, since 2×231203110442121² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (231203110442131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11623165 + ... + 24443898.

It is an arithmetic number, because the mean of its divisors is an integer number (10788199848360).

Almost surely, 2^{231203110442121} is an apocalyptic number.

It is an amenable number.

231203110442121 is a deficient number, since it is larger than the sum of its proper divisors (114019284705399).

231203110442121 is a wasteful number, since it uses less digits than its factorization.

231203110442121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36068942 (or 36068936 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 231203110442121 its reverse (121244011302132), we get a palindrome (352447121744253).

The spelling of 231203110442121 in words is "two hundred thirty-one trillion, two hundred three billion, one hundred ten million, four hundred forty-two thousand, one hundred twenty-one".