13110022231221 has 4 divisors (see below), whose sum is σ = 17480029641632. Its totient is φ = 8740014820812.

The previous prime is 13110022231183. The next prime is 13110022231303. The reversal of 13110022231221 is 12213222001131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13110022231221 - 2¹¹ = 13110022229173 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 (13110022231921) 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, 2185003705201 + ... + 2185003705206.

It is an arithmetic number, because the mean of its divisors is an integer number (4370007410408).

Almost surely, 2^{13110022231221} is an apocalyptic number.

It is an amenable number.

13110022231221 is a deficient number, since it is larger than the sum of its proper divisors (4370007410411).

13110022231221 is an equidigital number, since it uses as much as digits as its factorization.

13110022231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370007410410.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 13110022231221 its reverse (12213222001131), we get a palindrome (25323244232352).

The spelling of 13110022231221 in words is "thirteen trillion, one hundred ten billion, twenty-two million, two hundred thirty-one thousand, two hundred twenty-one".