22100123 has 4 divisors (see below), whose sum is σ = 22166040. Its totient is φ = 22034208.

The previous prime is 22100081. The next prime is 22100129. The reversal of 22100123 is 32100122.

It is a happy number.

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 22100123 - 2¹² = 22096027 is a prime.

It is a Duffinian number.

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 in 3 ways as a sum of consecutive naturals, for example, 32453 + ... + 33126.

It is an arithmetic number, because the mean of its divisors is an integer number (5541510).

Almost surely, 2^22100123 is an apocalyptic number.

22100123 is a deficient number, since it is larger than the sum of its proper divisors (65917).

22100123 is an equidigital number, since it uses as much as digits as its factorization.

22100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65916.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22100123 is about 4701.0767915447. The cubic root of 22100123 is about 280.6283634599.

Adding to 22100123 its reverse (32100122), we get a palindrome (54200245).

Subtracting 22100123 from its reverse (32100122), we obtain a palindrome (9999999).

The spelling of 22100123 in words is "twenty-two million, one hundred thousand, one hundred twenty-three".