11221857 has 12 divisors (see below), whose sum is σ = 16251300. Its totient is φ = 7461888.

The previous prime is 11221843. The next prime is 11221883. The reversal of 11221857 is 75812211.

It can be written as a sum of positive squares in 2 ways, for example, as 4124961 + 7096896 = 2031^2 + 2664^2 .

It is not a de Polignac number, because 11221857 - 2⁸ = 11221601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221857.

It is not an unprimeable number, because it can be changed into a prime (11221657) 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 11 ways as a sum of consecutive naturals, for example, 2653 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (1354275).

Almost surely, 2^11221857 is an apocalyptic number.

It is an amenable number.

11221857 is a deficient number, since it is larger than the sum of its proper divisors (5029443).

11221857 is a wasteful number, since it uses less digits than its factorization.

11221857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232 (or 3229 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 11221857 is about 3349.9040284760. The cubic root of 11221857 is about 223.8832366055.

The spelling of 11221857 in words is "eleven million, two hundred twenty-one thousand, eight hundred fifty-seven".