21222466313 has 4 divisors (see below), whose sum is σ = 21222997248. Its totient is φ = 21221935380.

The previous prime is 21222466303. The next prime is 21222466319. The reversal of 21222466313 is 31366422212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222466313 - 2¹⁰ = 21222465289 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 21222466313.

It is not an unprimeable number, because it can be changed into a prime (21222466319) 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, 200153 + ... + 287238.

It is an arithmetic number, because the mean of its divisors is an integer number (5305749312).

Almost surely, 2^21222466313 is an apocalyptic number.

It is an amenable number.

21222466313 is a deficient number, since it is larger than the sum of its proper divisors (530935).

21222466313 is an equidigital number, since it uses as much as digits as its factorization.

21222466313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530934.

The product of its digits is 20736, while the sum is 32.

Adding to 21222466313 its reverse (31366422212), we get a palindrome (52588888525).

The spelling of 21222466313 in words is "twenty-one billion, two hundred twenty-two million, four hundred sixty-six thousand, three hundred thirteen".