12220111211 has 16 divisors (see below), whose sum is σ = 15493697280. Its totient is φ = 9360768480.

The previous prime is 12220111153. The next prime is 12220111243. The reversal of 12220111211 is 11211102221.

It is not a de Polignac number, because 12220111211 - 2²² = 12215916907 is a prime.

It is a super-2 number, since 2×12220111211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220111511) 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, 1340396 + ... + 1349481.

It is an arithmetic number, because the mean of its divisors is an integer number (968356080).

Almost surely, 2^12220111211 is an apocalyptic number.

12220111211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12220111211 is a deficient number, since it is larger than the sum of its proper divisors (3273586069).

12220111211 is a wasteful number, since it uses less digits than its factorization.

12220111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689954.

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

Adding to 12220111211 its reverse (11211102221), we get a palindrome (23431213432).

The spelling of 12220111211 in words is "twelve billion, two hundred twenty million, one hundred eleven thousand, two hundred eleven".