11100100201221 has 16 divisors (see below), whose sum is σ = 15602830233984. Its totient is φ = 7005352341504.

The previous prime is 11100100201193. The next prime is 11100100201231. The reversal of 11100100201221 is 12210200100111.

It is not a de Polignac number, because 11100100201221 - 2⁵ = 11100100201189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11100100201197 and 11100100201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100100201231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829225356 + ... + 829238741.

It is an arithmetic number, because the mean of its divisors is an integer number (975176889624).

Almost surely, 2^{11100100201221} is an apocalyptic number.

It is an amenable number.

11100100201221 is a deficient number, since it is larger than the sum of its proper divisors (4502730032763).

11100100201221 is a wasteful number, since it uses less digits than its factorization.

11100100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658464220.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11100100201221 its reverse (12210200100111), we get a palindrome (23310300301332).

The spelling of 11100100201221 in words is "eleven trillion, one hundred billion, one hundred million, two hundred one thousand, two hundred twenty-one".