313311112221 has 4 divisors (see below), whose sum is σ = 417748149632. Its totient is φ = 208874074812.

The previous prime is 313311112217. The next prime is 313311112267. The reversal of 313311112221 is 122211113313.

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 313311112221 - 2² = 313311112217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313311112271) 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, 52218518701 + ... + 52218518706.

It is an arithmetic number, because the mean of its divisors is an integer number (104437037408).

Almost surely, 2^313311112221 is an apocalyptic number.

It is an amenable number.

313311112221 is a deficient number, since it is larger than the sum of its proper divisors (104437037411).

313311112221 is a wasteful number, since it uses less digits than its factorization.

313311112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104437037410.

The product of its digits is 216, while the sum is 21.

Adding to 313311112221 its reverse (122211113313), we get a palindrome (435522225534).

The spelling of 313311112221 in words is "three hundred thirteen billion, three hundred eleven million, one hundred twelve thousand, two hundred twenty-one".