221102011211 has 4 divisors (see below), whose sum is σ = 221103168000. Its totient is φ = 221100854424.

The previous prime is 221102011201. The next prime is 221102011219. The reversal of 221102011211 is 112110201122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102011211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102011219) 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, 216011 + ... + 699188.

It is an arithmetic number, because the mean of its divisors is an integer number (55275792000).

Almost surely, 2^221102011211 is an apocalyptic number.

221102011211 is a deficient number, since it is larger than the sum of its proper divisors (1156789).

221102011211 is an equidigital number, since it uses as much as digits as its factorization.

221102011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156788.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221102011211 its reverse (112110201122), we get a palindrome (333212212333).

It can be divided in two parts, 22110201121 and 1, that added together give a palindrome (22110201122).

The spelling of 221102011211 in words is "two hundred twenty-one billion, one hundred two million, eleven thousand, two hundred eleven".