21222222244403 has 16 divisors (see below), whose sum is σ = 21648084372096. Its totient is φ = 20800050315840.

The previous prime is 21222222244369. The next prime is 21222222244411. The reversal of 21222222244403 is 30444222222212.

It is a cyclic number.

It is not a de Polignac number, because 21222222244403 - 2¹⁶ = 21222222178867 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 21222222244403.

It is not an unprimeable number, because it can be changed into a prime (21222222240403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83487368 + ... + 83741178.

It is an arithmetic number, because the mean of its divisors is an integer number (1353005273256).

Almost surely, 2^{21222222244403} is an apocalyptic number.

21222222244403 is a deficient number, since it is larger than the sum of its proper divisors (425862127693).

21222222244403 is a wasteful number, since it uses less digits than its factorization.

21222222244403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261074.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 21222222244403 its reverse (30444222222212), we get a palindrome (51666444466615).

The spelling of 21222222244403 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred forty-four thousand, four hundred three".