221022211211 has 16 divisors (see below), whose sum is σ = 241604812800. Its totient is φ = 201538585248.

The previous prime is 221022211133. The next prime is 221022211237. The reversal of 221022211211 is 112112220122.

It is a cyclic number.

It is not a de Polignac number, because 221022211211 - 2²² = 221018016907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221022211211.

It is not an unprimeable number, because it can be changed into a prime (221022211271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044571 + ... + 2149956.

It is an arithmetic number, because the mean of its divisors is an integer number (15100300800).

Almost surely, 2^221022211211 is an apocalyptic number.

221022211211 is a deficient number, since it is larger than the sum of its proper divisors (20582601589).

221022211211 is a wasteful number, since it uses less digits than its factorization.

221022211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194658.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022211211 its reverse (112112220122), we get a palindrome (333134431333).

The spelling of 221022211211 in words is "two hundred twenty-one billion, twenty-two million, two hundred eleven thousand, two hundred eleven".