21222312303 has 4 divisors (see below), whose sum is σ = 28296416408. Its totient is φ = 14148208200.

The previous prime is 21222312277. The next prime is 21222312323. The reversal of 21222312303 is 30321322212.

It is a happy number.

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

It is not a de Polignac number, because 21222312303 - 2⁶ = 21222312239 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 21222312303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222312323) 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, 3537052048 + ... + 3537052053.

It is an arithmetic number, because the mean of its divisors is an integer number (7074104102).

Almost surely, 2^21222312303 is an apocalyptic number.

21222312303 is a deficient number, since it is larger than the sum of its proper divisors (7074104105).

21222312303 is an equidigital number, since it uses as much as digits as its factorization.

21222312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074104104.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21222312303 its reverse (30321322212), we get a palindrome (51543634515).

Subtracting 21222312303 from its reverse (30321322212), we obtain a palindrome (9099009909).

The spelling of 21222312303 in words is "twenty-one billion, two hundred twenty-two million, three hundred twelve thousand, three hundred three".