221200000011 has 16 divisors (see below), whose sum is σ = 329350464000. Its totient is φ = 146725624584.

The previous prime is 221200000009. The next prime is 221200000031. The reversal of 221200000011 is 110000002122.

It is not a de Polignac number, because 221200000011 - 2¹ = 221200000009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221199999939 and 221200000002.

It is not an unprimeable number, because it can be changed into a prime (221200000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20579031 + ... + 20589776.

It is an arithmetic number, because the mean of its divisors is an integer number (20584404000).

Almost surely, 2^221200000011 is an apocalyptic number.

221200000011 is a deficient number, since it is larger than the sum of its proper divisors (108150463989).

221200000011 is a wasteful number, since it uses less digits than its factorization.

221200000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41169015 (or 41169009 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 221200000011 its reverse (110000002122), we get a palindrome (331200002133).

The spelling of 221200000011 in words is "two hundred twenty-one billion, two hundred million, eleven", and thus it is an aban number.