11221220313 has 6 divisors (see below), whose sum is σ = 16208429354. Its totient is φ = 7480813536.

The previous prime is 11221220201. The next prime is 11221220321. The reversal of 11221220313 is 31302212211.

11221220313 is a `hidden beast` number, since 112 + 21 + 220 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9527321664 + 1693898649 = 97608^2 + 41157^2 .

It is not a de Polignac number, because 11221220313 - 2²⁰ = 11220171737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221220323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623401120 + ... + 623401137.

Almost surely, 2^11221220313 is an apocalyptic number.

It is an amenable number.

11221220313 is a deficient number, since it is larger than the sum of its proper divisors (4987209041).

11221220313 is a wasteful number, since it uses less digits than its factorization.

11221220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246802263 (or 1246802260 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11221220313 its reverse (31302212211), we get a palindrome (42523432524).

The spelling of 11221220313 in words is "eleven billion, two hundred twenty-one million, two hundred twenty thousand, three hundred thirteen".