313310242100021 has 4 divisors (see below), whose sum is σ = 313310844860844. Its totient is φ = 313309639339200.

The previous prime is 313310242100003. The next prime is 313310242100027. The reversal of 313310242100021 is 120001242013313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222545560397521 + 90764681702500 = 14917961^2 + 9527050^2 .

It is a cyclic number.

It is not a de Polignac number, because 313310242100021 - 2²⁶ = 313310174991157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313310242100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313310242100027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300600050 + ... + 301640531.

It is an arithmetic number, because the mean of its divisors is an integer number (78327711215211).

Almost surely, 2^{313310242100021} is an apocalyptic number.

It is an amenable number.

313310242100021 is a deficient number, since it is larger than the sum of its proper divisors (602760823).

313310242100021 is an equidigital number, since it uses as much as digits as its factorization.

313310242100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602760822.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 313310242100021 its reverse (120001242013313), we get a palindrome (433311484113334).

The spelling of 313310242100021 in words is "three hundred thirteen trillion, three hundred ten billion, two hundred forty-two million, one hundred thousand, twenty-one".