312233332121 has 4 divisors (see below), whose sum is σ = 312294836772. Its totient is φ = 312171827472.

The previous prime is 312233332091. The next prime is 312233332157. The reversal of 312233332121 is 121233332213.

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 264184692121 + 48048640000 = 513989^2 + 219200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312233332121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312233332171) 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, 30744710 + ... + 30754863.

It is an arithmetic number, because the mean of its divisors is an integer number (78073709193).

Almost surely, 2^312233332121 is an apocalyptic number.

It is an amenable number.

312233332121 is a deficient number, since it is larger than the sum of its proper divisors (61504651).

312233332121 is an equidigital number, since it uses as much as digits as its factorization.

312233332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61504650.

The product of its digits is 3888, while the sum is 26.

Adding to 312233332121 its reverse (121233332213), we get a palindrome (433466664334).

The spelling of 312233332121 in words is "three hundred twelve billion, two hundred thirty-three million, three hundred thirty-two thousand, one hundred twenty-one".