11220641 has 2 divisors, whose sum is σ = 11220642. Its totient is φ = 11220640.

The previous prime is 11220637. The next prime is 11220647. The reversal of 11220641 is 14602211.

11220641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6270016 + 4950625 = 2504^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220641 - 2² = 11220637 is a prime.

It is a Chen prime.

It is equal to p₇₄₀₁₄₁ and since 11220641 and 740141 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11220647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610320 + 5610321.

It is an arithmetic number, because the mean of its divisors is an integer number (5610321).

Almost surely, 2^11220641 is an apocalyptic number.

It is an amenable number.

11220641 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220641 is an equidigital number, since it uses as much as digits as its factorization.

11220641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 11220641 is about 3349.7225258221. The cubic root of 11220641 is about 223.8751496537.

Adding to 11220641 its reverse (14602211), we get a palindrome (25822852).

The spelling of 11220641 in words is "eleven million, two hundred twenty thousand, six hundred forty-one".