221020201122211 has 4 divisors (see below), whose sum is σ = 221069393248032. Its totient is φ = 220971008996392.

The previous prime is 221020201122179. The next prime is 221020201122221. The reversal of 221020201122211 is 112221102020122.

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 221020201122211 - 2⁵ = 221020201122179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020201122221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24596056171 + ... + 24596065156.

It is an arithmetic number, because the mean of its divisors is an integer number (55267348312008).

Almost surely, 2^{221020201122211} is an apocalyptic number.

221020201122211 is a deficient number, since it is larger than the sum of its proper divisors (49192125821).

221020201122211 is an equidigital number, since it uses as much as digits as its factorization.

221020201122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49192125820.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221020201122211 its reverse (112221102020122), we get a palindrome (333241303142333).

The spelling of 221020201122211 in words is "two hundred twenty-one trillion, twenty billion, two hundred one million, one hundred twenty-two thousand, two hundred eleven".