21216222226303 has 6 divisors (see below), whose sum is σ = 22973779097304. Its totient is φ = 19584205131816.

The previous prime is 21216222226219. The next prime is 21216222226321. The reversal of 21216222226303 is 30362222261212.

It is not a de Polignac number, because 21216222226303 - 2⁹ = 21216222225791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216222226393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62769888075 + ... + 62769888412.

It is an arithmetic number, because the mean of its divisors is an integer number (3828963182884).

Almost surely, 2^{21216222226303} is an apocalyptic number.

21216222226303 is a deficient number, since it is larger than the sum of its proper divisors (1757556871001).

21216222226303 is a wasteful number, since it uses less digits than its factorization.

21216222226303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125539776513 (or 125539776500 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 21216222226303 its reverse (30362222261212), we get a palindrome (51578444487515).

The spelling of 21216222226303 in words is "twenty-one trillion, two hundred sixteen billion, two hundred twenty-two million, two hundred twenty-six thousand, three hundred three".