11221656 has 32 divisors (see below), whose sum is σ = 28814640. Its totient is φ = 3639168.

The previous prime is 11221643. The next prime is 11221657. The reversal of 11221656 is 65612211.

11221656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5431 + ... + 7206.

Almost surely, 2^11221656 is an apocalyptic number.

It is an amenable number.

11221656 is an abundant number, since it is smaller than the sum of its proper divisors (17592984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221656 is a wasteful number, since it uses less digits than its factorization.

11221656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683 (or 12679 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 11221656 is about 3349.8740274822. The cubic root of 11221656 is about 223.8818999046.

Adding to 11221656 its reverse (65612211), we get a palindrome (76833867).

The spelling of 11221656 in words is "eleven million, two hundred twenty-one thousand, six hundred fifty-six".