312021123397 has 2 divisors, whose sum is σ = 312021123398. Its totient is φ = 312021123396.

The previous prime is 312021123347. The next prime is 312021123439. The reversal of 312021123397 is 793321120213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165914470276 + 146106653121 = 407326^2 + 382239^2 .

It is a cyclic number.

It is not a de Polignac number, because 312021123397 - 2¹⁹ = 312020599109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312021123347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156010561698 + 156010561699.

It is an arithmetic number, because the mean of its divisors is an integer number (156010561699).

Almost surely, 2^312021123397 is an apocalyptic number.

It is an amenable number.

312021123397 is a deficient number, since it is larger than the sum of its proper divisors (1).

312021123397 is an equidigital number, since it uses as much as digits as its factorization.

312021123397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 312021123397 in words is "three hundred twelve billion, twenty-one million, one hundred twenty-three thousand, three hundred ninety-seven".