313044333400021 has 2 divisors, whose sum is σ = 313044333400022. Its totient is φ = 313044333400020.

The previous prime is 313044333400009. The next prime is 313044333400063. The reversal of 313044333400021 is 120004333440313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288869794668900 + 24174538731121 = 16996170^2 + 4916761^2 .

It is a cyclic number.

It is not a de Polignac number, because 313044333400021 - 2¹⁹ = 313044332875733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313044333404021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156522166700010 + 156522166700011.

It is an arithmetic number, because the mean of its divisors is an integer number (156522166700011).

Almost surely, 2^{313044333400021} is an apocalyptic number.

It is an amenable number.

313044333400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

313044333400021 is an equidigital number, since it uses as much as digits as its factorization.

313044333400021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 313044333400021 its reverse (120004333440313), we get a palindrome (433048666840334).

The spelling of 313044333400021 in words is "three hundred thirteen trillion, forty-four billion, three hundred thirty-three million, four hundred thousand, twenty-one".