22221123 has 4 divisors (see below), whose sum is σ = 29628168. Its totient is φ = 14814080.

The previous prime is 22221109. The next prime is 22221161. The reversal of 22221123 is 32112222.

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 22221123 - 2¹⁶ = 22155587 is a prime.

It is a super-2 number, since 2×22221123² = 987556614762258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22221523) 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, 3703518 + ... + 3703523.

It is an arithmetic number, because the mean of its divisors is an integer number (7407042).

Almost surely, 2^22221123 is an apocalyptic number.

22221123 is a deficient number, since it is larger than the sum of its proper divisors (7407045).

22221123 is an equidigital number, since it uses as much as digits as its factorization.

22221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407044.

The product of its digits is 96, while the sum is 15.

The square root of 22221123 is about 4713.9286163454. The cubic root of 22221123 is about 281.1395860912.

Adding to 22221123 its reverse (32112222), we get a palindrome (54333345).

The spelling of 22221123 in words is "twenty-two million, two hundred twenty-one thousand, one hundred twenty-three".