231202310121 has 16 divisors (see below), whose sum is σ = 342736483200. Its totient is φ = 154038329424.

The previous prime is 231202310117. The next prime is 231202310123. The reversal of 231202310121 is 121013202132.

231202310121 is a `hidden beast` number, since 2 + 31 + 202 + 310 + 121 = 666.

It is not a de Polignac number, because 231202310121 - 2² = 231202310117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231202310094 and 231202310103.

It is not an unprimeable number, because it can be changed into a prime (231202310123) 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 15 ways as a sum of consecutive naturals, for example, 2637861 + ... + 2724098.

It is an arithmetic number, because the mean of its divisors is an integer number (21421030200).

Almost surely, 2^231202310121 is an apocalyptic number.

It is an amenable number.

231202310121 is a deficient number, since it is larger than the sum of its proper divisors (111534173079).

231202310121 is a wasteful number, since it uses less digits than its factorization.

231202310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363565 (or 5363559 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231202310121 its reverse (121013202132), we get a palindrome (352215512253).

The spelling of 231202310121 in words is "two hundred thirty-one billion, two hundred two million, three hundred ten thousand, one hundred twenty-one".