12221110111 has 4 divisors (see below), whose sum is σ = 13966982992. Its totient is φ = 10475237232.

The previous prime is 12221110073. The next prime is 12221110117. The reversal of 12221110111 is 11101112221.

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 12221110111 - 2¹⁷ = 12220979039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221110091 and 12221110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221110117) 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, 872936430 + ... + 872936443.

It is an arithmetic number, because the mean of its divisors is an integer number (3491745748).

Almost surely, 2^12221110111 is an apocalyptic number.

12221110111 is a deficient number, since it is larger than the sum of its proper divisors (1745872881).

12221110111 is an equidigital number, since it uses as much as digits as its factorization.

12221110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745872880.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12221110111 its reverse (11101112221), we get a palindrome (23322222332).

The spelling of 12221110111 in words is "twelve billion, two hundred twenty-one million, one hundred ten thousand, one hundred eleven".