313220033121 has 4 divisors (see below), whose sum is σ = 417626710832. Its totient is φ = 208813355412.

The previous prime is 313220033117. The next prime is 313220033129. The reversal of 313220033121 is 121330022313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 313220033121 - 2² = 313220033117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313220033129) 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, 52203338851 + ... + 52203338856.

It is an arithmetic number, because the mean of its divisors is an integer number (104406677708).

Almost surely, 2^313220033121 is an apocalyptic number.

It is an amenable number.

313220033121 is a deficient number, since it is larger than the sum of its proper divisors (104406677711).

313220033121 is a wasteful number, since it uses less digits than its factorization.

313220033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104406677710.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 313220033121 its reverse (121330022313), we get a palindrome (434550055434).

The spelling of 313220033121 in words is "three hundred thirteen billion, two hundred twenty million, thirty-three thousand, one hundred twenty-one".