22101999 has 4 divisors (see below), whose sum is σ = 29469336. Its totient is φ = 14734664.

The previous prime is 22101979. The next prime is 22102013. The reversal of 22101999 is 99910122.

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

It is a cyclic number.

It is not a de Polignac number, because 22101999 - 2⁵ = 22101967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683664 + ... + 3683669.

It is an arithmetic number, because the mean of its divisors is an integer number (7367334).

Almost surely, 2^22101999 is an apocalyptic number.

22101999 is a deficient number, since it is larger than the sum of its proper divisors (7367337).

22101999 is an equidigital number, since it uses as much as digits as its factorization.

22101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367336.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 22101999 is about 4701.2763160657. The cubic root of 22101999 is about 280.6363037462.

The spelling of 22101999 in words is "twenty-two million, one hundred one thousand, nine hundred ninety-nine".