201020221211 has 4 divisors (see below), whose sum is σ = 201559149792. Its totient is φ = 200481292632.

The previous prime is 201020221189. The next prime is 201020221229. The reversal of 201020221211 is 112122020102.

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-201020221211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020221271) 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, 269463731 + ... + 269464476.

It is an arithmetic number, because the mean of its divisors is an integer number (50389787448).

Almost surely, 2^201020221211 is an apocalyptic number.

201020221211 is a deficient number, since it is larger than the sum of its proper divisors (538928581).

201020221211 is an equidigital number, since it uses as much as digits as its factorization.

201020221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538928580.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201020221211 its reverse (112122020102), we get a palindrome (313142241313).

The spelling of 201020221211 in words is "two hundred one billion, twenty million, two hundred twenty-one thousand, two hundred eleven".