11412221 has 4 divisors (see below), whose sum is σ = 11431452. Its totient is φ = 11392992.

The previous prime is 11412199. The next prime is 11412223. The reversal of 11412221 is 12221411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12221411 = 61 ⋅200351.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 6300100 = 2261^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 11412221 - 2¹⁸ = 11150077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11412196 and 11412205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11412223) 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, 8696 + ... + 9921.

It is an arithmetic number, because the mean of its divisors is an integer number (2857863).

Almost surely, 2^11412221 is an apocalyptic number.

It is an amenable number.

11412221 is a deficient number, since it is larger than the sum of its proper divisors (19231).

11412221 is an equidigital number, since it uses as much as digits as its factorization.

11412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19230.

The product of its digits is 32, while the sum is 14.

The square root of 11412221 is about 3378.1978923681. The cubic root of 11412221 is about 225.1421061141.

Adding to 11412221 its product of digits (32), we get a triangular number (11412253 = T₄₇₇₇).

Adding to 11412221 its reverse (12221411), we get a palindrome (23633632).

The spelling of 11412221 in words is "eleven million, four hundred twelve thousand, two hundred twenty-one".