11111022102221 has 16 divisors (see below), whose sum is σ = 11916831939840. Its totient is φ = 10327325636160.

The previous prime is 11111022102217. The next prime is 11111022102263. The reversal of 11111022102221 is 12220122011111.

11111022102221 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 11111022102221 - 2² = 11111022102217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111022102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111022107221) 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, 39769211 + ... + 40047623.

It is an arithmetic number, because the mean of its divisors is an integer number (744801996240).

Almost surely, 2^{11111022102221} is an apocalyptic number.

It is an amenable number.

11111022102221 is a deficient number, since it is larger than the sum of its proper divisors (805809837619).

11111022102221 is a wasteful number, since it uses less digits than its factorization.

11111022102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318116.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11111022102221 its reverse (12220122011111), we get a palindrome (23331144113332).

The spelling of 11111022102221 in words is "eleven trillion, one hundred eleven billion, twenty-two million, one hundred two thousand, two hundred twenty-one".