221200222200111 has 96 divisors (see below), whose sum is σ = 404379284594688. Its totient is φ = 113171236326720.

The previous prime is 221200222200091. The next prime is 221200222200137. The reversal of 221200222200111 is 111002222002122.

It is a happy number.

221200222200111 is a `hidden beast` number, since 221 + 20 + 0 + 222 + 200 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 221200222200111 - 2⁵ = 221200222200079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200222200011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 230143206 + ... + 231102348.

It is an arithmetic number, because the mean of its divisors is an integer number (4212284214528).

Almost surely, 2^{221200222200111} is an apocalyptic number.

221200222200111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221200222200111 is a deficient number, since it is larger than the sum of its proper divisors (183179062394577).

221200222200111 is a wasteful number, since it uses less digits than its factorization.

221200222200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964201 (or 964198 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221200222200111 its reverse (111002222002122), we get a palindrome (332202444202233).

The spelling of 221200222200111 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, two hundred thousand, one hundred eleven".