313120234322221 has 4 divisors (see below), whose sum is σ = 313122912305500. Its totient is φ = 313117556338944.

The previous prime is 313120234322143. The next prime is 313120234322327. The reversal of 313120234322221 is 122223432021313.

It is a happy number.

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 143550615150121 + 169569619172100 = 11981261^2 + 13021890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313120234322221 is a prime.

It is a super-2 number, since 2×313120234322221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313120234322521) 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, 1338816246 + ... + 1339050103.

It is an arithmetic number, because the mean of its divisors is an integer number (78280728076375).

Almost surely, 2^{313120234322221} is an apocalyptic number.

It is an amenable number.

313120234322221 is a deficient number, since it is larger than the sum of its proper divisors (2677983279).

313120234322221 is a wasteful number, since it uses less digits than its factorization.

313120234322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677983278.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 313120234322221 its reverse (122223432021313), we get a palindrome (435343666343534).

The spelling of 313120234322221 in words is "three hundred thirteen trillion, one hundred twenty billion, two hundred thirty-four million, three hundred twenty-two thousand, two hundred twenty-one".