313102021 has 2 divisors, whose sum is σ = 313102022. Its totient is φ = 313102020.

The previous prime is 313102001. The next prime is 313102033. The reversal of 313102021 is 120201313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292033921 + 21068100 = 17089^2 + 4590^2 .

It is a cyclic number.

It is not a de Polignac number, because 313102021 - 2⁵ = 313101989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313101992 and 313102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313102001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156551010 + 156551011.

It is an arithmetic number, because the mean of its divisors is an integer number (156551011).

Almost surely, 2^313102021 is an apocalyptic number.

It is an amenable number.

313102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

313102021 is an equidigital number, since it uses as much as digits as its factorization.

313102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 313102021 is about 17694.6890619756. The cubic root of 313102021 is about 679.0398943246.

Adding to 313102021 its reverse (120201313), we get a palindrome (433303334).

The spelling of 313102021 in words is "three hundred thirteen million, one hundred two thousand, twenty-one".