321512122469 has 2 divisors, whose sum is σ = 321512122470. Its totient is φ = 321512122468.

The previous prime is 321512122409. The next prime is 321512122471. The reversal of 321512122469 is 964221215123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299811002500 + 21701119969 = 547550^2 + 147313^2 .

It is a cyclic number.

It is not a de Polignac number, because 321512122469 - 2⁸ = 321512122213 is a prime.

It is a super-2 number, since 2×321512122469² (a number of 24 digits) contains 22 as substring.

Together with 321512122471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321512122409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160756061234 + 160756061235.

It is an arithmetic number, because the mean of its divisors is an integer number (160756061235).

Almost surely, 2^321512122469 is an apocalyptic number.

It is an amenable number.

321512122469 is a deficient number, since it is larger than the sum of its proper divisors (1).

321512122469 is an equidigital number, since it uses as much as digits as its factorization.

321512122469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The spelling of 321512122469 in words is "three hundred twenty-one billion, five hundred twelve million, one hundred twenty-two thousand, four hundred sixty-nine".