221100199999 has 16 divisors (see below), whose sum is σ = 256248241920. Its totient is φ = 186844777920.

The previous prime is 221100199981. The next prime is 221100200033. The reversal of 221100199999 is 999991001122.

It is a cyclic number.

It is not a de Polignac number, because 221100199999 - 2¹⁵ = 221100167231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100199939) 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, 1233984 + ... + 1401754.

It is an arithmetic number, because the mean of its divisors is an integer number (16015515120).

Almost surely, 2^221100199999 is an apocalyptic number.

221100199999 is a deficient number, since it is larger than the sum of its proper divisors (35148041921).

221100199999 is a wasteful number, since it uses less digits than its factorization.

221100199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170430.

The product of its (nonzero) digits is 236196, while the sum is 52.

The spelling of 221100199999 in words is "two hundred twenty-one billion, one hundred million, one hundred ninety-nine thousand, nine hundred ninety-nine".