21100332222 has 16 divisors (see below), whose sum is σ = 46889627280. Its totient is φ = 7033444056.

The previous prime is 21100332203. The next prime is 21100332223. The reversal of 21100332222 is 22223300112.

21100332222 is a `hidden beast` number, since 2 + 110 + 0 + 332 + 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 = 21100332195 and 21100332204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100332223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195373393 + ... + 195373500.

It is an arithmetic number, because the mean of its divisors is an integer number (2930601705).

Almost surely, 2^21100332222 is an apocalyptic number.

21100332222 is an abundant number, since it is smaller than the sum of its proper divisors (25789295058).

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

21100332222 is a wasteful number, since it uses less digits than its factorization.

21100332222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390746904 (or 390746898 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21100332222 its reverse (22223300112), we get a palindrome (43323632334).

The spelling of 21100332222 in words is "twenty-one billion, one hundred million, three hundred thirty-two thousand, two hundred twenty-two".