221122222211211 has 12 divisors (see below), whose sum is σ = 308205643059048. Its totient is φ = 141005475032224.

The previous prime is 221122222211197. The next prime is 221122222211227. The reversal of 221122222211211 is 112112222221122.

It is not a de Polignac number, because 221122222211211 - 2⁹ = 221122222210699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122222211281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69666735090 + ... + 69666738263.

It is an arithmetic number, because the mean of its divisors is an integer number (25683803588254).

Almost surely, 2^{221122222211211} is an apocalyptic number.

221122222211211 is a deficient number, since it is larger than the sum of its proper divisors (87083420847837).

221122222211211 is a wasteful number, since it uses less digits than its factorization.

221122222211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139333473402 (or 139333473379 counting only the distinct ones).

The product of its digits is 512, while the sum is 24.

Adding to 221122222211211 its reverse (112112222221122), we get a palindrome (333234444432333).

It can be divided in two parts, 22112222221121 and 1, that added together give a palindrome (22112222221122).

The spelling of 221122222211211 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".