221421203572211 has 4 divisors (see below), whose sum is σ = 227405560425552. Its totient is φ = 215436846718872.

The previous prime is 221421203572187. The next prime is 221421203572249. The reversal of 221421203572211 is 112275302124122.

221421203572211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221421203572211 - 2²² = 221421199377907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221421205572211) 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, 2992178426615 + ... + 2992178426688.

It is an arithmetic number, because the mean of its divisors is an integer number (56851390106388).

Almost surely, 2^{221421203572211} is an apocalyptic number.

221421203572211 is a deficient number, since it is larger than the sum of its proper divisors (5984356853341).

221421203572211 is an equidigital number, since it uses as much as digits as its factorization.

221421203572211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984356853340.

The product of its (nonzero) digits is 26880, while the sum is 35.

Adding to 221421203572211 its reverse (112275302124122), we get a palindrome (333696505696333).

The spelling of 221421203572211 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy-two thousand, two hundred eleven".