21222221002110 has 48 divisors (see below), whose sum is σ = 55179392574384. Its totient is φ = 5659092988416.

The previous prime is 21222221002067. The next prime is 21222221002189. The reversal of 21222221002110 is 1120012222212.

It is a happy number.

21222221002110 is a `hidden beast` number, since 21 + 2 + 222 + 210 + 0 + 211 + 0 = 666.

21222221002110 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355492 + ... + 6524631.

It is an arithmetic number, because the mean of its divisors is an integer number (1149570678633).

Almost surely, 2^{21222221002110} is an apocalyptic number.

21222221002110 is an abundant number, since it is smaller than the sum of its proper divisors (33957171572274).

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

21222221002110 is a wasteful number, since it uses less digits than its factorization.

21222221002110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6914409 (or 6914406 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222221002110 its reverse (1120012222212), we get a palindrome (22342233224322).

The spelling of 21222221002110 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, two thousand, one hundred ten".