11021110012221 has 16 divisors (see below), whose sum is σ = 14801158236480. Its totient is φ = 7294238709120.

The previous prime is 11021110012151. The next prime is 11021110012223. The reversal of 11021110012221 is 12221001112011.

It is a happy number.

It is not a de Polignac number, because 11021110012221 - 2⁷ = 11021110012093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11021110012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021110012223) 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, 9515881 + ... + 10611041.

It is an arithmetic number, because the mean of its divisors is an integer number (925072389780).

Almost surely, 2^{11021110012221} is an apocalyptic number.

It is an amenable number.

11021110012221 is a deficient number, since it is larger than the sum of its proper divisors (3780048224259).

11021110012221 is a wasteful number, since it uses less digits than its factorization.

11021110012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119436.

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

Adding to 11021110012221 its reverse (12221001112011), we get a palindrome (23242111124232).

The spelling of 11021110012221 in words is "eleven trillion, twenty-one billion, one hundred ten million, twelve thousand, two hundred twenty-one".