11100112021221 has 16 divisors (see below), whose sum is σ = 14967378391680. Its totient is φ = 7316470557440.

The previous prime is 11100112021217. The next prime is 11100112021223. The reversal of 11100112021221 is 12212021100111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11100112021221 - 2² = 11100112021217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11100112021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100112021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3008641 + ... + 5590361.

It is an arithmetic number, because the mean of its divisors is an integer number (935461149480).

Almost surely, 2^{11100112021221} is an apocalyptic number.

It is an amenable number.

11100112021221 is a deficient number, since it is larger than the sum of its proper divisors (3867266370459).

11100112021221 is a wasteful number, since it uses less digits than its factorization.

11100112021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597916.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11100112021221 its reverse (12212021100111), we get a palindrome (23312133121332).

The spelling of 11100112021221 in words is "eleven trillion, one hundred billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".