313220021117 has 2 divisors, whose sum is σ = 313220021118. Its totient is φ = 313220021116.

The previous prime is 313220021099. The next prime is 313220021291. The reversal of 313220021117 is 711120022313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309771278041 + 3448743076 = 556571^2 + 58726^2 .

It is a cyclic number.

It is not a de Polignac number, because 313220021117 - 2¹⁰ = 313220020093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313220021092 and 313220021101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313220071117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156610010558 + 156610010559.

It is an arithmetic number, because the mean of its divisors is an integer number (156610010559).

Almost surely, 2^313220021117 is an apocalyptic number.

It is an amenable number.

313220021117 is a deficient number, since it is larger than the sum of its proper divisors (1).

313220021117 is an equidigital number, since it uses as much as digits as its factorization.

313220021117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The spelling of 313220021117 in words is "three hundred thirteen billion, two hundred twenty million, twenty-one thousand, one hundred seventeen".