312312233141021 has 2 divisors, whose sum is σ = 312312233141022. Its totient is φ = 312312233141020.

The previous prime is 312312233141011. The next prime is 312312233141057. The reversal of 312312233141021 is 120141332213213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258770656322500 + 53541576818521 = 16086350^2 + 7317211^2 .

It is a cyclic number.

It is not a de Polignac number, because 312312233141021 - 2¹⁰ = 312312233139997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312312233141011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156156116570510 + 156156116570511.

It is an arithmetic number, because the mean of its divisors is an integer number (156156116570511).

Almost surely, 2^{312312233141021} is an apocalyptic number.

It is an amenable number.

312312233141021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312312233141021 is an equidigital number, since it uses as much as digits as its factorization.

312312233141021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 312312233141021 its reverse (120141332213213), we get a palindrome (432453565354234).

The spelling of 312312233141021 in words is "three hundred twelve trillion, three hundred twelve billion, two hundred thirty-three million, one hundred forty-one thousand, twenty-one".