221122112013 has 72 divisors (see below), whose sum is σ = 361179131040. Its totient is φ = 129246698880.

The previous prime is 221122112009. The next prime is 221122112021. The reversal of 221122112013 is 310211221122.

It is not a de Polignac number, because 221122112013 - 2² = 221122112009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122112213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16400631 + ... + 16414107.

It is an arithmetic number, because the mean of its divisors is an integer number (5016376820).

Almost surely, 2^221122112013 is an apocalyptic number.

It is an amenable number.

221122112013 is a deficient number, since it is larger than the sum of its proper divisors (140057019027).

221122112013 is a wasteful number, since it uses less digits than its factorization.

221122112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659 (or 13603 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221122112013 its reverse (310211221122), we get a palindrome (531333333135).

The spelling of 221122112013 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, thirteen".