312132421441021 has 2 divisors, whose sum is σ = 312132421441022. Its totient is φ = 312132421441020.

The previous prime is 312132421440991. The next prime is 312132421441067. The reversal of 312132421441021 is 120144124231213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296134709359225 + 15997712081796 = 17208565^2 + 3999714^2 .

It is a cyclic number.

It is not a de Polignac number, because 312132421441021 - 2¹¹ = 312132421438973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312132421441721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156066210720510 + 156066210720511.

It is an arithmetic number, because the mean of its divisors is an integer number (156066210720511).

Almost surely, 2^{312132421441021} is an apocalyptic number.

It is an amenable number.

312132421441021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312132421441021 is an equidigital number, since it uses as much as digits as its factorization.

312132421441021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 312132421441021 its reverse (120144124231213), we get a palindrome (432276545672234).

The spelling of 312132421441021 in words is "three hundred twelve trillion, one hundred thirty-two billion, four hundred twenty-one million, four hundred forty-one thousand, twenty-one".