323120312212121 has 2 divisors, whose sum is σ = 323120312212122. Its totient is φ = 323120312212120.

The previous prime is 323120312212097. The next prime is 323120312212123. The reversal of 323120312212121 is 121212213021323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304646863506496 + 18473448705625 = 17454136^2 + 4298075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323120312212121 is a prime.

Together with 323120312212123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (323120312212123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161560156106060 + 161560156106061.

It is an arithmetic number, because the mean of its divisors is an integer number (161560156106061).

Almost surely, 2^{323120312212121} is an apocalyptic number.

It is an amenable number.

323120312212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

323120312212121 is an equidigital number, since it uses as much as digits as its factorization.

323120312212121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 323120312212121 its reverse (121212213021323), we get a palindrome (444332525233444).

The spelling of 323120312212121 in words is "three hundred twenty-three trillion, one hundred twenty billion, three hundred twelve million, two hundred twelve thousand, one hundred twenty-one".