11141221 has 16 divisors (see below), whose sum is σ = 13805568. Its totient is φ = 8755200.

The previous prime is 11141167. The next prime is 11141237. The reversal of 11141221 is 12214111.

It is a 6-Lehmer number, since φ(11141221) divides (11141221-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 11141221 - 2⁹ = 11140709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11141321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17061 + ... + 17701.

It is an arithmetic number, because the mean of its divisors is an integer number (862848).

Almost surely, 2^11141221 is an apocalyptic number.

It is an amenable number.

11141221 is a deficient number, since it is larger than the sum of its proper divisors (2664347).

11141221 is a wasteful number, since it uses less digits than its factorization.

11141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its digits is 16, while the sum is 13.

The square root of 11141221 is about 3337.8467610123. The cubic root of 11141221 is about 223.3457004117.

Adding to 11141221 its reverse (12214111), we get a palindrome (23355332).

The spelling of 11141221 in words is "eleven million, one hundred forty-one thousand, two hundred twenty-one".