22121123 has 4 divisors (see below), whose sum is σ = 22213920. Its totient is φ = 22028328.

The previous prime is 22121089. The next prime is 22121137. The reversal of 22121123 is 32112122.

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 22121123 - 2⁶ = 22121059 is a prime.

It is a super-2 number, since 2×22121123² = 978688165562258, 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 = 22121098 and 22121107.

It is not an unprimeable number, because it can be changed into a prime (22121173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46040 + ... + 46517.

It is an arithmetic number, because the mean of its divisors is an integer number (5553480).

Almost surely, 2^22121123 is an apocalyptic number.

22121123 is a deficient number, since it is larger than the sum of its proper divisors (92797).

22121123 is an equidigital number, since it uses as much as digits as its factorization.

22121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92796.

The product of its digits is 48, while the sum is 14.

The square root of 22121123 is about 4703.3097920507. The cubic root of 22121123 is about 280.7172216381.

Adding to 22121123 its reverse (32112122), we get a palindrome (54233245).

Subtracting 22121123 from its reverse (32112122), we obtain a palindrome (9990999).

The spelling of 22121123 in words is "twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".