312021131369 has 2 divisors, whose sum is σ = 312021131370. Its totient is φ = 312021131368.

The previous prime is 312021131351. The next prime is 312021131393. The reversal of 312021131369 is 963131120213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222018131344 + 90003000025 = 471188^2 + 300005^2 .

It is an emirp because it is prime and its reverse (963131120213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312021131369 - 2¹⁶ = 312021065833 is a prime.

It is a super-2 number, since 2×312021131369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312021131339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156010565684 + 156010565685.

It is an arithmetic number, because the mean of its divisors is an integer number (156010565685).

Almost surely, 2^312021131369 is an apocalyptic number.

It is an amenable number.

312021131369 is a deficient number, since it is larger than the sum of its proper divisors (1).

312021131369 is an equidigital number, since it uses as much as digits as its factorization.

312021131369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 312021131369 in words is "three hundred twelve billion, twenty-one million, one hundred thirty-one thousand, three hundred sixty-nine".