21100110200221 has 8 divisors (see below), whose sum is σ = 22803489581600. Its totient is φ = 19408201387632.

The previous prime is 21100110200209. The next prime is 21100110200231. The reversal of 21100110200221 is 12200201100112.

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

It is a cyclic number.

It is not a de Polignac number, because 21100110200221 - 2⁹ = 21100110199709 is a prime.

It is a super-2 number, since 2×21100110200221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100110200231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2867638371 + ... + 2867645728.

It is an arithmetic number, because the mean of its divisors is an integer number (2850436197700).

Almost surely, 2^{21100110200221} is an apocalyptic number.

It is an amenable number.

21100110200221 is a deficient number, since it is larger than the sum of its proper divisors (1703379381379).

21100110200221 is a wasteful number, since it uses less digits than its factorization.

21100110200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735284395.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100110200221 its reverse (12200201100112), we get a palindrome (33300311300333).

The spelling of 21100110200221 in words is "twenty-one trillion, one hundred billion, one hundred ten million, two hundred thousand, two hundred twenty-one".