221020021199 has 16 divisors (see below), whose sum is σ = 227243749920. Its totient is φ = 214846369920.

The previous prime is 221020021169. The next prime is 221020021241. The reversal of 221020021199 is 991120020122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020021199 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 (221020021139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43531049 + ... + 43536125.

It is an arithmetic number, because the mean of its divisors is an integer number (14202734370).

Almost surely, 2^221020021199 is an apocalyptic number.

221020021199 is a deficient number, since it is larger than the sum of its proper divisors (6223728721).

221020021199 is a wasteful number, since it uses less digits than its factorization.

221020021199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 221020021199 in words is "two hundred twenty-one billion, twenty million, twenty-one thousand, one hundred ninety-nine".