11220761 has 2 divisors, whose sum is σ = 11220762. Its totient is φ = 11220760.

The previous prime is 11220749. The next prime is 11220763. The reversal of 11220761 is 16702211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 697225 = 3244^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220761 - 2¹⁸ = 10958617 is a prime.

Together with 11220763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11220763) 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 as a sum of consecutive naturals, namely, 5610380 + 5610381.

It is an arithmetic number, because the mean of its divisors is an integer number (5610381).

Almost surely, 2^11220761 is an apocalyptic number.

It is an amenable number.

11220761 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220761 is an equidigital number, since it uses as much as digits as its factorization.

11220761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 11220761 is about 3349.7404377056. The cubic root of 11220761 is about 223.8759477341.

Adding to 11220761 its reverse (16702211), we get a palindrome (27922972).

It can be divided in two parts, 112 and 20761, that multiplied together give a palindrome (2325232).

The spelling of 11220761 in words is "eleven million, two hundred twenty thousand, seven hundred sixty-one".