11121201 has 48 divisors (see below), whose sum is σ = 20360704. Its totient is φ = 5692032.

The previous prime is 11121197. The next prime is 11121217. The reversal of 11121201 is 10212111.

It is a happy number.

It is not a de Polignac number, because 11121201 - 2² = 11121197 is a prime.

It is a super-2 number, since 2×11121201² = 247362223364802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11121601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30120 + ... + 30486.

Almost surely, 2^11121201 is an apocalyptic number.

It is an amenable number.

11121201 is a deficient number, since it is larger than the sum of its proper divisors (9239503).

11121201 is a wasteful number, since it uses less digits than its factorization.

11121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11121201 is about 3334.8464732278. The cubic root of 11121201 is about 223.2118412996.

Adding to 11121201 its reverse (10212111), we get a palindrome (21333312).

It can be divided in two parts, 111 and 21201, that added together give a palindrome (21312).

The spelling of 11121201 in words is "eleven million, one hundred twenty-one thousand, two hundred one".