231302032121 has 4 divisors (see below), whose sum is σ = 231702902772. Its totient is φ = 230901161472.

The previous prime is 231302032103. The next prime is 231302032133. The reversal of 231302032121 is 121230203132.

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 170705317225 + 60596714896 = 413165^2 + 246164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231302032121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231302032093 and 231302032102.

It is not an unprimeable number, because it can be changed into a prime (231302032141) 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, 200434460 + ... + 200435613.

It is an arithmetic number, because the mean of its divisors is an integer number (57925725693).

Almost surely, 2^231302032121 is an apocalyptic number.

It is an amenable number.

231302032121 is a deficient number, since it is larger than the sum of its proper divisors (400870651).

231302032121 is an equidigital number, since it uses as much as digits as its factorization.

231302032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400870650.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231302032121 its reverse (121230203132), we get a palindrome (352532235253).

The spelling of 231302032121 in words is "two hundred thirty-one billion, three hundred two million, thirty-two thousand, one hundred twenty-one".