11521201 has 4 divisors (see below), whose sum is σ = 12127600. Its totient is φ = 10914804.

The previous prime is 11521199. The next prime is 11521249. The reversal of 11521201 is 10212511.

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 11521201 - 2¹ = 11521199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521501) 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, 303171 + ... + 303208.

It is an arithmetic number, because the mean of its divisors is an integer number (3031900).

Almost surely, 2^11521201 is an apocalyptic number.

It is an amenable number.

11521201 is a deficient number, since it is larger than the sum of its proper divisors (606399).

11521201 is an equidigital number, since it uses as much as digits as its factorization.

11521201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606398.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 11521201 is about 3394.2894690936. The cubic root of 11521201 is about 225.8564951606.

Adding to 11521201 its reverse (10212511), we get a palindrome (21733712).

It can be divided in two parts, 115 and 21201, that added together give a square (21316 = 146²).

The spelling of 11521201 in words is "eleven million, five hundred twenty-one thousand, two hundred one".