2211221111211 has 64 divisors (see below), whose sum is σ = 3758209228800. Its totient is φ = 1258723279008.

The previous prime is 2211221111201. The next prime is 2211221111213. The reversal of 2211221111211 is 1121111221122.

It is a happy number.

2211221111211 is a `hidden beast` number, since 221 + 1 + 221 + 1 + 11 + 211 = 666.

It is not a de Polignac number, because 2211221111211 - 2¹⁴ = 2211221094827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2211221111213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54150960 + ... + 54191778.

It is an arithmetic number, because the mean of its divisors is an integer number (58722019200).

Almost surely, 2^{2211221111211} is an apocalyptic number.

2211221111211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2211221111211 is a deficient number, since it is larger than the sum of its proper divisors (1546988117589).

2211221111211 is a wasteful number, since it uses less digits than its factorization.

2211221111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41925 (or 41919 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 2211221111211 its reverse (1121111221122), we get a palindrome (3332332332333).

The spelling of 2211221111211 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".