312021127469 has 2 divisors, whose sum is σ = 312021127470. Its totient is φ = 312021127468.

The previous prime is 312021127403. The next prime is 312021127493. The reversal of 312021127469 is 964721120213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307649934244 + 4371193225 = 554662^2 + 66115^2 .

It is a cyclic number.

It is not a de Polignac number, because 312021127469 - 2²⁰ = 312020078893 is a prime.

It is a super-2 number, since 2×312021127469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312021127069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156010563734 + 156010563735.

It is an arithmetic number, because the mean of its divisors is an integer number (156010563735).

Almost surely, 2^312021127469 is an apocalyptic number.

It is an amenable number.

312021127469 is a deficient number, since it is larger than the sum of its proper divisors (1).

312021127469 is an equidigital number, since it uses as much as digits as its factorization.

312021127469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 312021127469 in words is "three hundred twelve billion, twenty-one million, one hundred twenty-seven thousand, four hundred sixty-nine".