221001220010211 has 4 divisors (see below), whose sum is σ = 294668293346952. Its totient is φ = 147334146673472.

The previous prime is 221001220010191. The next prime is 221001220010273. The reversal of 221001220010211 is 112010022100122.

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

It is a cyclic number.

It is not a de Polignac number, because 221001220010211 - 2¹⁰ = 221001220009187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001220010111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36833536668366 + ... + 36833536668371.

It is an arithmetic number, because the mean of its divisors is an integer number (73667073336738).

Almost surely, 2^{221001220010211} is an apocalyptic number.

221001220010211 is a deficient number, since it is larger than the sum of its proper divisors (73667073336741).

221001220010211 is an equidigital number, since it uses as much as digits as its factorization.

221001220010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73667073336740.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001220010211 its reverse (112010022100122), we get a palindrome (333011242110333).

The spelling of 221001220010211 in words is "two hundred twenty-one trillion, one billion, two hundred twenty million, ten thousand, two hundred eleven".