221200220220211 has 4 divisors (see below), whose sum is σ = 222323063977872. Its totient is φ = 220077376462552.

The previous prime is 221200220220157. The next prime is 221200220220269. The reversal of 221200220220211 is 112022022002122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200220220211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221200220230211) 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 3 ways as a sum of consecutive naturals, for example, 561421878535 + ... + 561421878928.

It is an arithmetic number, because the mean of its divisors is an integer number (55580765994468).

Almost surely, 2^{221200220220211} is an apocalyptic number.

221200220220211 is a deficient number, since it is larger than the sum of its proper divisors (1122843757661).

221200220220211 is a wasteful number, since it uses less digits than its factorization.

221200220220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122843757660.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221200220220211 its reverse (112022022002122), we get a palindrome (333222242222333).

The spelling of 221200220220211 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty million, two hundred twenty thousand, two hundred eleven".