13220112121 has 4 divisors (see below), whose sum is σ = 13247712000. Its totient is φ = 13192512244.

The previous prime is 13220112083. The next prime is 13220112127. The reversal of 13220112121 is 12121102231.

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 a cyclic number.

It is not a de Polignac number, because 13220112121 - 2²⁵ = 13186557689 is a prime.

It is a super-2 number, since 2×13220112121² (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 = 13220112095 and 13220112104.

It is not an unprimeable number, because it can be changed into a prime (13220112127) 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, 13799221 + ... + 13800178.

It is an arithmetic number, because the mean of its divisors is an integer number (3311928000).

Almost surely, 2^13220112121 is an apocalyptic number.

It is an amenable number.

13220112121 is a deficient number, since it is larger than the sum of its proper divisors (27599879).

13220112121 is an equidigital number, since it uses as much as digits as its factorization.

13220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27599878.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13220112121 its reverse (12121102231), we get a palindrome (25341214352).

The spelling of 13220112121 in words is "thirteen billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".