231133310313121 has 4 divisors (see below), whose sum is σ = 231133343699092. Its totient is φ = 231133276927152.

The previous prime is 231133310313053. The next prime is 231133310313127. The reversal of 231133310313121 is 121313013331132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63222535587600 + 167910774725521 = 7951260^2 + 12958039^2 .

It is a cyclic number.

It is not a de Polignac number, because 231133310313121 - 2²¹ = 231133308215969 is a prime.

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 231133310313121.

It is not an unprimeable number, because it can be changed into a prime (231133310313127) 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, 1993986 + ... + 21592651.

It is an arithmetic number, because the mean of its divisors is an integer number (57783335924773).

Almost surely, 2^{231133310313121} is an apocalyptic number.

It is an amenable number.

231133310313121 is a deficient number, since it is larger than the sum of its proper divisors (33385971).

231133310313121 is an equidigital number, since it uses as much as digits as its factorization.

231133310313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33385970.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 231133310313121 its reverse (121313013331132), we get a palindrome (352446323644253).

The spelling of 231133310313121 in words is "two hundred thirty-one trillion, one hundred thirty-three billion, three hundred ten million, three hundred thirteen thousand, one hundred twenty-one".