21303111222 has 24 divisors (see below), whose sum is σ = 46174049064. Its totient is φ = 7098374304.

The previous prime is 21303111187. The next prime is 21303111223. The reversal of 21303111222 is 22211130312.

21303111222 is a `hidden beast` number, since 2 + 130 + 311 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21303111195 and 21303111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303111223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172263 + ... + 268850.

It is an arithmetic number, because the mean of its divisors is an integer number (1923918711).

Almost surely, 2^21303111222 is an apocalyptic number.

21303111222 is an abundant number, since it is smaller than the sum of its proper divisors (24870937842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21303111222 is a wasteful number, since it uses less digits than its factorization.

21303111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443804 (or 443801 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21303111222 its reverse (22211130312), we get a palindrome (43514241534).

The spelling of 21303111222 in words is "twenty-one billion, three hundred three million, one hundred eleven thousand, two hundred twenty-two".