11110220221 has 16 divisors (see below), whose sum is σ = 11538777600. Its totient is φ = 10689494400.

The previous prime is 11110220213. The next prime is 11110220243. The reversal of 11110220221 is 12202201111.

It is a cyclic number.

It is not a de Polignac number, because 11110220221 - 2³ = 11110220213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110220021) 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, 3979336 + ... + 3982126.

It is an arithmetic number, because the mean of its divisors is an integer number (721173600).

Almost surely, 2^11110220221 is an apocalyptic number.

It is an amenable number.

11110220221 is a deficient number, since it is larger than the sum of its proper divisors (428557379).

11110220221 is a wasteful number, since it uses less digits than its factorization.

11110220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11110220221 its reverse (12202201111), we get a palindrome (23312421332).

The spelling of 11110220221 in words is "eleven billion, one hundred ten million, two hundred twenty thousand, two hundred twenty-one".