2111222211211 has 4 divisors (see below), whose sum is σ = 2111288996632. Its totient is φ = 2111155425792.

The previous prime is 2111222211209. The next prime is 2111222211233. The reversal of 2111222211211 is 1121122221112.

It is a happy number.

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 2111222211211 - 2¹ = 2111222211209 is a prime.

It is a super-2 number, since 2×2111222211211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111222211251) 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, 33345270 + ... + 33408523.

It is an arithmetic number, because the mean of its divisors is an integer number (527822249158).

Almost surely, 2^{2111222211211} is an apocalyptic number.

2111222211211 is a deficient number, since it is larger than the sum of its proper divisors (66785421).

2111222211211 is an equidigital number, since it uses as much as digits as its factorization.

2111222211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66785420.

The product of its digits is 64, while the sum is 19.

Adding to 2111222211211 its reverse (1121122221112), we get a palindrome (3232344432323).

Subtracting from 2111222211211 its reverse (1121122221112), we obtain a palindrome (990099990099).

The spelling of 2111222211211 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".