13221112231 has 4 divisors (see below), whose sum is σ = 13222457464. Its totient is φ = 13219767000.

The previous prime is 13221112199. The next prime is 13221112237.

13221112231 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221112231 - 2⁵ = 13221112199 is a prime.

It is a super-2 number, since 2×13221112231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221112199 and 13221112208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221112237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657765 + ... + 677566.

It is an arithmetic number, because the mean of its divisors is an integer number (3305614366).

Almost surely, 2^13221112231 is an apocalyptic number.

13221112231 is a deficient number, since it is larger than the sum of its proper divisors (1345233).

13221112231 is an equidigital number, since it uses as much as digits as its factorization.

13221112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345232.

The product of its digits is 144, while the sum is 19.

The spelling of 13221112231 in words is "thirteen billion, two hundred twenty-one million, one hundred twelve thousand, two hundred thirty-one".