11921201 has 4 divisors (see below), whose sum is σ = 12212004. Its totient is φ = 11630400.

The previous prime is 11921197. The next prime is 11921209. The reversal of 11921201 is 10212911.

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 361201 + 11560000 = 601^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11921201 - 2² = 11921197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11921201.

It is not an unprimeable number, because it can be changed into a prime (11921209) 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, 145340 + ... + 145421.

It is an arithmetic number, because the mean of its divisors is an integer number (3053001).

Almost surely, 2^11921201 is an apocalyptic number.

It is an amenable number.

11921201 is a deficient number, since it is larger than the sum of its proper divisors (290803).

11921201 is an equidigital number, since it uses as much as digits as its factorization.

11921201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290802.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 11921201 is about 3452.7092261006. The cubic root of 11921201 is about 228.4406235027.

The spelling of 11921201 in words is "eleven million, nine hundred twenty-one thousand, two hundred one".