11221705 has 16 divisors (see below), whose sum is σ = 14756544. Its totient is φ = 8124480.

The previous prime is 11221697. The next prime is 11221709. The reversal of 11221705 is 50712211.

It is not a de Polignac number, because 11221705 - 2³ = 11221697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221709) 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 15 ways as a sum of consecutive naturals, for example, 20242 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (922284).

Almost surely, 2^11221705 is an apocalyptic number.

It is an amenable number.

11221705 is a deficient number, since it is larger than the sum of its proper divisors (3534839).

11221705 is a wasteful number, since it uses less digits than its factorization.

With its successor (11221706) it forms an eRAP, since the sums of their prime factors are consecutive (936 and 937).

11221705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 11221705 is about 3349.8813411821. The cubic root of 11221705 is about 223.8822257685.

Adding to 11221705 its reverse (50712211), we get a palindrome (61933916).

The spelling of 11221705 in words is "eleven million, two hundred twenty-one thousand, seven hundred five".