21100221011222 has 8 divisors (see below), whose sum is σ = 31650670220376. Its totient is φ = 10549997604432.

The previous prime is 21100221011209. The next prime is 21100221011231. The reversal of 21100221011222 is 22211012200112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21100221011222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56216783 + ... + 56590874.

It is an arithmetic number, because the mean of its divisors is an integer number (3956333777547).

Almost surely, 2^{21100221011222} is an apocalyptic number.

21100221011222 is a deficient number, since it is larger than the sum of its proper divisors (10550449209154).

21100221011222 is a wasteful number, since it uses less digits than its factorization.

21100221011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112901182.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21100221011222 its reverse (22211012200112), we get a palindrome (43311233211334).

The spelling of 21100221011222 in words is "twenty-one trillion, one hundred billion, two hundred twenty-one million, eleven thousand, two hundred twenty-two".