13911121 has 4 divisors (see below), whose sum is σ = 15898432. Its totient is φ = 11923812.

The previous prime is 13911119. The next prime is 13911127. The reversal of 13911121 is 12111931.

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 13911121 - 2¹ = 13911119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13911127) 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, 993645 + ... + 993658.

It is an arithmetic number, because the mean of its divisors is an integer number (3974608).

Almost surely, 2^13911121 is an apocalyptic number.

It is an amenable number.

13911121 is a deficient number, since it is larger than the sum of its proper divisors (1987311).

13911121 is an equidigital number, since it uses as much as digits as its factorization.

13911121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987310.

The product of its digits is 54, while the sum is 19.

The square root of 13911121 is about 3729.7615205265. The cubic root of 13911121 is about 240.5031170220.

The spelling of 13911121 in words is "thirteen million, nine hundred eleven thousand, one hundred twenty-one".