21222211203 has 24 divisors (see below), whose sum is σ = 31143411936. Its totient is φ = 13924080000.

The previous prime is 21222211183. The next prime is 21222211211. The reversal of 21222211203 is 30211222212.

It is a de Polignac number, because none of the positive numbers 2^k-21222211203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222211403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81903 + ... + 221703.

It is an arithmetic number, because the mean of its divisors is an integer number (1297642164).

Almost surely, 2^21222211203 is an apocalyptic number.

21222211203 is a deficient number, since it is larger than the sum of its proper divisors (9921200733).

21222211203 is a wasteful number, since it uses less digits than its factorization.

21222211203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140075 (or 140072 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222211203 its reverse (30211222212), we get a palindrome (51433433415).

The spelling of 21222211203 in words is "twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred three".