11197121 has 4 divisors (see below), whose sum is σ = 12058452. Its totient is φ = 10335792.

The previous prime is 11197117. The next prime is 11197127. The reversal of 11197121 is 12179111.

It is a happy number.

11197121 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 5340721 = 2420^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 11197121 - 2² = 11197117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11197127) 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, 430646 + ... + 430671.

It is an arithmetic number, because the mean of its divisors is an integer number (3014613).

Almost surely, 2^11197121 is an apocalyptic number.

It is an amenable number.

11197121 is a deficient number, since it is larger than the sum of its proper divisors (861331).

11197121 is an equidigital number, since it uses as much as digits as its factorization.

11197121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861330.

The product of its digits is 126, while the sum is 23.

The square root of 11197121 is about 3346.2099455952. The cubic root of 11197121 is about 223.7186159075.

The spelling of 11197121 in words is "eleven million, one hundred ninety-seven thousand, one hundred twenty-one".