22011123 has 4 divisors (see below), whose sum is σ = 29348168. Its totient is φ = 14674080.

The previous prime is 22011113. The next prime is 22011131. The reversal of 22011123 is 32111022.

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

It is not a de Polignac number, because 22011123 - 2⁵ = 22011091 is a prime.

It is a super-2 number, since 2×22011123² = 968979071442258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011099 and 22011108.

It is not an unprimeable number, because it can be changed into a prime (22011113) 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, 3668518 + ... + 3668523.

It is an arithmetic number, because the mean of its divisors is an integer number (7337042).

Almost surely, 2^22011123 is an apocalyptic number.

22011123 is a deficient number, since it is larger than the sum of its proper divisors (7337045).

22011123 is an equidigital number, since it uses as much as digits as its factorization.

22011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7337044.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22011123 is about 4691.6013257735. The cubic root of 22011123 is about 280.2511479630.

Adding to 22011123 its reverse (32111022), we get a palindrome (54122145).

The spelling of 22011123 in words is "twenty-two million, eleven thousand, one hundred twenty-three".