313133123021 has 2 divisors, whose sum is σ = 313133123022. Its totient is φ = 313133123020.

The previous prime is 313133122933. The next prime is 313133123077. The reversal of 313133123021 is 120321331313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302075548996 + 11057574025 = 549614^2 + 105155^2 .

It is a cyclic number.

It is not a de Polignac number, because 313133123021 - 2¹⁸ = 313132860877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313133123321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156566561510 + 156566561511.

It is an arithmetic number, because the mean of its divisors is an integer number (156566561511).

Almost surely, 2^313133123021 is an apocalyptic number.

It is an amenable number.

313133123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

313133123021 is an equidigital number, since it uses as much as digits as its factorization.

313133123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 313133123021 its reverse (120321331313), we get a palindrome (433454454334).

The spelling of 313133123021 in words is "three hundred thirteen billion, one hundred thirty-three million, one hundred twenty-three thousand, twenty-one".