11221221002221 has 16 divisors (see below), whose sum is σ = 11617211496960. Its totient is φ = 10825836199360.

The previous prime is 11221221002183. The next prime is 11221221002231. The reversal of 11221221002221 is 12220012212211.

11221221002221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11221221002221 - 2¹⁷ = 11221220871149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221221002231) 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, 368727876 + ... + 368758306.

It is an arithmetic number, because the mean of its divisors is an integer number (726075718560).

Almost surely, 2^{11221221002221} is an apocalyptic number.

It is an amenable number.

11221221002221 is a deficient number, since it is larger than the sum of its proper divisors (395990494739).

11221221002221 is a wasteful number, since it uses less digits than its factorization.

11221221002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39956.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11221221002221 its reverse (12220012212211), we get a palindrome (23441233214432).

The spelling of 11221221002221 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, two thousand, two hundred twenty-one".