22121303123 has 4 divisors (see below), whose sum is σ = 22173848208. Its totient is φ = 22068758040.

The previous prime is 22121303069. The next prime is 22121303129. The reversal of 22121303123 is 32130312122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32130312122 = 2 ⋅16065156061.

It is a cyclic number.

It is not a de Polignac number, because 22121303123 - 2⁶ = 22121303059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121303095 and 22121303104.

It is not an unprimeable number, because it can be changed into a prime (22121303129) 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, 26271911 + ... + 26272752.

It is an arithmetic number, because the mean of its divisors is an integer number (5543462052).

Almost surely, 2^22121303123 is an apocalyptic number.

22121303123 is a deficient number, since it is larger than the sum of its proper divisors (52545085).

22121303123 is an equidigital number, since it uses as much as digits as its factorization.

22121303123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52545084.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 22121303123 its reverse (32130312122), we get a palindrome (54251615245).

The spelling of 22121303123 in words is "twenty-two billion, one hundred twenty-one million, three hundred three thousand, one hundred twenty-three".