11111222200221 has 48 divisors (see below), whose sum is σ = 18883260264960. Its totient is φ = 6206886092160.

The previous prime is 11111222200193. The next prime is 11111222200237. The reversal of 11111222200221 is 12200222211111.

11111222200221 is a `hidden beast` number, since 1 + 11 + 11 + 222 + 200 + 221 = 666.

11111222200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11111222200221 - 2⁷ = 11111222200093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111222200194 and 11111222200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111222200241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5504941 + ... + 7247538.

It is an arithmetic number, because the mean of its divisors is an integer number (393401255520).

Almost surely, 2^{11111222200221} is an apocalyptic number.

11111222200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111222200221 is a deficient number, since it is larger than the sum of its proper divisors (7772038064739).

11111222200221 is a wasteful number, since it uses less digits than its factorization.

11111222200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12753186 (or 12753183 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11111222200221 its reverse (12200222211111), we get a palindrome (23311444411332).

The spelling of 11111222200221 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, two hundred thousand, two hundred twenty-one".