22122221123 has 4 divisors (see below), whose sum is σ = 23084056848. Its totient is φ = 21160385400.

The previous prime is 22122221111. The next prime is 22122221141. The reversal of 22122221123 is 32112222122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122221123 is a prime.

It is a super-2 number, since 2×22122221123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22122221095 and 22122221104.

It is not an unprimeable number, because it can be changed into a prime (22122221923) 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, 480917828 + ... + 480917873.

It is an arithmetic number, because the mean of its divisors is an integer number (5771014212).

Almost surely, 2^22122221123 is an apocalyptic number.

22122221123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22122221123 is a deficient number, since it is larger than the sum of its proper divisors (961835725).

22122221123 is an equidigital number, since it uses as much as digits as its factorization.

22122221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961835724.

The product of its digits is 384, while the sum is 20.

Adding to 22122221123 its reverse (32112222122), we get a palindrome (54234443245).

Subtracting 22122221123 from its reverse (32112222122), we obtain a palindrome (9990000999).

The spelling of 22122221123 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-three".