21222222203 has 32 divisors (see below), whose sum is σ = 26981928960. Its totient is φ = 16237687680.

The previous prime is 21222222181. The next prime is 21222222209. The reversal of 21222222203 is 30222222212.

It is a cyclic number.

It is not a de Polignac number, because 21222222203 - 2⁶ = 21222222139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222222209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7273901 + ... + 7276817.

It is an arithmetic number, because the mean of its divisors is an integer number (843185280).

Almost surely, 2^21222222203 is an apocalyptic number.

21222222203 is a deficient number, since it is larger than the sum of its proper divisors (5759706757).

21222222203 is a wasteful number, since it uses less digits than its factorization.

21222222203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21222222203 its reverse (30222222212), we get a palindrome (51444444415).

Subtracting 21222222203 from its reverse (30222222212), we obtain a palindrome (9000000009).

The spelling of 21222222203 in words is "twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred three".