21224414333 has 4 divisors (see below), whose sum is σ = 21718005408. Its totient is φ = 20730823260.

The previous prime is 21224414317. The next prime is 21224414347. The reversal of 21224414333 is 33341442212.

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 21224414333 - 2⁴ = 21224414317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21224414296 and 21224414305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224414633) 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, 246795473 + ... + 246795558.

It is an arithmetic number, because the mean of its divisors is an integer number (5429501352).

Almost surely, 2^21224414333 is an apocalyptic number.

It is an amenable number.

21224414333 is a deficient number, since it is larger than the sum of its proper divisors (493591075).

21224414333 is an equidigital number, since it uses as much as digits as its factorization.

21224414333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493591074.

The product of its digits is 13824, while the sum is 29.

Adding to 21224414333 its reverse (33341442212), we get a palindrome (54565856545).

The spelling of 21224414333 in words is "twenty-one billion, two hundred twenty-four million, four hundred fourteen thousand, three hundred thirty-three".