11221021 has 8 divisors (see below), whose sum is σ = 12870144. Its totient is φ = 9583440.

The previous prime is 11221009. The next prime is 11221043. The reversal of 11221021 is 12012211.

11221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221021 is a prime.

It is a super-2 number, since 2×11221021² = 251822624564882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11220989 and 11221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221051) 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, 685 + ... + 4786.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^11221021 is an apocalyptic number.

It is an amenable number.

11221021 is a deficient number, since it is larger than the sum of its proper divisors (1649123).

11221021 is an equidigital number, since it uses as much as digits as its factorization.

11221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 11221021 is about 3349.7792464579. The cubic root of 11221021 is about 223.8776768889.

Adding to 11221021 its reverse (12012211), we get a palindrome (23233232).

The spelling of 11221021 in words is "eleven million, two hundred twenty-one thousand, twenty-one".