22140004123 has 4 divisors (see below), whose sum is σ = 22140573880. Its totient is φ = 22139434368.

The previous prime is 22140004067. The next prime is 22140004129. The reversal of 22140004123 is 32140004122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32140004122 = 2 ⋅16070002061.

It is a cyclic number.

It is not a de Polignac number, because 22140004123 - 2¹⁷ = 22139873051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22140004123.

It is not an unprimeable number, because it can be changed into a prime (22140004129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221958 + ... + 305851.

It is an arithmetic number, because the mean of its divisors is an integer number (5535143470).

Almost surely, 2^22140004123 is an apocalyptic number.

22140004123 is a deficient number, since it is larger than the sum of its proper divisors (569757).

22140004123 is an equidigital number, since it uses as much as digits as its factorization.

22140004123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569756.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22140004123 its reverse (32140004122), we get a palindrome (54280008245).

Subtracting 22140004123 from its reverse (32140004122), we obtain a palindrome (9999999999).

The spelling of 22140004123 in words is "twenty-two billion, one hundred forty million, four thousand, one hundred twenty-three".