13221210111 has 16 divisors (see below), whose sum is σ = 18205891200. Its totient is φ = 8527997088.

The previous prime is 13221210049. The next prime is 13221210127. The reversal of 13221210111 is 11101212231.

It is a de Polignac number, because none of the positive numbers 2^k-13221210111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221210151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312841 + ... + 352578.

It is an arithmetic number, because the mean of its divisors is an integer number (1137868200).

Almost surely, 2^13221210111 is an apocalyptic number.

13221210111 is a deficient number, since it is larger than the sum of its proper divisors (4984681089).

13221210111 is a wasteful number, since it uses less digits than its factorization.

13221210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665638.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 13221210111 its reverse (11101212231), we get a palindrome (24322422342).

The spelling of 13221210111 in words is "thirteen billion, two hundred twenty-one million, two hundred ten thousand, one hundred eleven".