21200100221222 has 16 divisors (see below), whose sum is σ = 34247437687680. Its totient is φ = 9784341084672.

The previous prime is 21200100221203. The next prime is 21200100221231. The reversal of 21200100221222 is 22212200100212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200100221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12546683 + ... + 14135750.

It is an arithmetic number, because the mean of its divisors is an integer number (2140464855480).

Almost surely, 2^{21200100221222} is an apocalyptic number.

21200100221222 is a deficient number, since it is larger than the sum of its proper divisors (13047337466458).

21200100221222 is a wasteful number, since it uses less digits than its factorization.

21200100221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26713007.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21200100221222 its reverse (22212200100212), we get a palindrome (43412300321434).

The spelling of 21200100221222 in words is "twenty-one trillion, two hundred billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".