11220331311 has 12 divisors (see below), whose sum is σ = 18522451792. Its totient is φ = 6411617856.

The previous prime is 11220331259. The next prime is 11220331349. The reversal of 11220331311 is 11313302211.

11220331311 is a `hidden beast` number, since 1 + 1 + 2 + 20 + 331 + 311 = 666.

It is not a de Polignac number, because 11220331311 - 2¹⁸ = 11220069167 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 (11220335311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89050186 + ... + 89050311.

Almost surely, 2^11220331311 is an apocalyptic number.

11220331311 is a deficient number, since it is larger than the sum of its proper divisors (7302120481).

11220331311 is a wasteful number, since it uses less digits than its factorization.

11220331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178100510 (or 178100507 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11220331311 its reverse (11313302211), we get a palindrome (22533633522).

The spelling of 11220331311 in words is "eleven billion, two hundred twenty million, three hundred thirty-one thousand, three hundred eleven".