22100128 has 12 divisors (see below), whose sum is σ = 43509690. Its totient is φ = 11050048.

The previous prime is 22100081. The next prime is 22100129. The reversal of 22100128 is 82100122.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 85264 = 4692^2 + 292^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (22100129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345283 + ... + 345346.

Almost surely, 2^22100128 is an apocalyptic number.

It is an amenable number.

22100128 is a deficient number, since it is larger than the sum of its proper divisors (21409562).

22100128 is an equidigital number, since it uses as much as digits as its factorization.

22100128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690639 (or 690631 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 22100128 is about 4701.0773233377. The cubic root of 22100128 is about 280.6283846233.

The spelling of 22100128 in words is "twenty-two million, one hundred thousand, one hundred twenty-eight".