21232425223 has 4 divisors (see below), whose sum is σ = 21549327160. Its totient is φ = 20915523288.

The previous prime is 21232425199. The next prime is 21232425287. The reversal of 21232425223 is 32252423212.

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 21232425223 - 2⁵ = 21232425191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232425191 and 21232425200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232429223) 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, 158450868 + ... + 158451001.

It is an arithmetic number, because the mean of its divisors is an integer number (5387331790).

Almost surely, 2^21232425223 is an apocalyptic number.

21232425223 is a deficient number, since it is larger than the sum of its proper divisors (316901937).

21232425223 is an equidigital number, since it uses as much as digits as its factorization.

21232425223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316901936.

The product of its digits is 11520, while the sum is 28.

Adding to 21232425223 its reverse (32252423212), we get a palindrome (53484848435).

The spelling of 21232425223 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty-five thousand, two hundred twenty-three".