312233445431021 has 2 divisors, whose sum is σ = 312233445431022. Its totient is φ = 312233445431020.

The previous prime is 312233445431003. The next prime is 312233445431041. The reversal of 312233445431021 is 120134544332213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275230422604900 + 37003022826121 = 16590070^2 + 6083011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312233445431021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312233445431041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156116722715510 + 156116722715511.

It is an arithmetic number, because the mean of its divisors is an integer number (156116722715511).

Almost surely, 2^{312233445431021} is an apocalyptic number.

It is an amenable number.

312233445431021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312233445431021 is an equidigital number, since it uses as much as digits as its factorization.

312233445431021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 312233445431021 its reverse (120134544332213), we get a palindrome (432367989763234).

The spelling of 312233445431021 in words is "three hundred twelve trillion, two hundred thirty-three billion, four hundred forty-five million, four hundred thirty-one thousand, twenty-one".