22131220223 has 4 divisors (see below), whose sum is σ = 25292823120. Its totient is φ = 18969617328.

The previous prime is 22131220213. The next prime is 22131220247. The reversal of 22131220223 is 32202213122.

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 22131220223 - 2⁸ = 22131219967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22131220195 and 22131220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131220213) 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, 1580801438 + ... + 1580801451.

It is an arithmetic number, because the mean of its divisors is an integer number (6323205780).

Almost surely, 2^22131220223 is an apocalyptic number.

22131220223 is a deficient number, since it is larger than the sum of its proper divisors (3161602897).

22131220223 is an equidigital number, since it uses as much as digits as its factorization.

22131220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161602896.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22131220223 its reverse (32202213122), we get a palindrome (54333433345).

The spelling of 22131220223 in words is "twenty-two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred twenty-three".