13220111331 has 40 divisors (see below), whose sum is σ = 22734660960. Its totient is φ = 7499164032.

The previous prime is 13220111287. The next prime is 13220111363. The reversal of 13220111331 is 13311102231.

13220111331 is a `hidden beast` number, since 1 + 3 + 220 + 111 + 331 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13220111331 is a prime.

It is a super-2 number, since 2×13220111331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13220111371) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7416 + ... + 162773.

It is an arithmetic number, because the mean of its divisors is an integer number (568366524).

Almost surely, 2^13220111331 is an apocalyptic number.

13220111331 is a deficient number, since it is larger than the sum of its proper divisors (9514549629).

13220111331 is a wasteful number, since it uses less digits than its factorization.

13220111331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170345 (or 170336 counting only the distinct ones).

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

Adding to 13220111331 its reverse (13311102231), we get a palindrome (26531213562).

The spelling of 13220111331 in words is "thirteen billion, two hundred twenty million, one hundred eleven thousand, three hundred thirty-one".