11220061 has 4 divisors (see below), whose sum is σ = 11245500. Its totient is φ = 11194624.

The previous prime is 11220037. The next prime is 11220073. The reversal of 11220061 is 16002211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9765625 + 1454436 = 3125^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220061 - 2⁵ = 11220029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12046 + ... + 12943.

It is an arithmetic number, because the mean of its divisors is an integer number (2811375).

Almost surely, 2^11220061 is an apocalyptic number.

It is an amenable number.

11220061 is a deficient number, since it is larger than the sum of its proper divisors (25439).

11220061 is an equidigital number, since it uses as much as digits as its factorization.

11220061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25438.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 11220061 is about 3349.6359503683. The cubic root of 11220061 is about 223.8712921847.

Adding to 11220061 its reverse (16002211), we get a palindrome (27222272).

The spelling of 11220061 in words is "eleven million, two hundred twenty thousand, sixty-one".