12221211122111 has 8 divisors (see below), whose sum is σ = 12228223650384. Its totient is φ = 12214200136320.

The previous prime is 12221211122089. The next prime is 12221211122123. The reversal of 12221211122111 is 11122111212221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221211122111 - 2⁴² = 7823164611007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221211122161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15656021 + ... + 16418081.

It is an arithmetic number, because the mean of its divisors is an integer number (1528527956298).

Almost surely, 2^{12221211122111} is an apocalyptic number.

12221211122111 is a deficient number, since it is larger than the sum of its proper divisors (7012528273).

12221211122111 is an equidigital number, since it uses as much as digits as its factorization.

12221211122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771241.

The product of its digits is 64, while the sum is 20.

Adding to 12221211122111 its reverse (11122111212221), we get a palindrome (23343322334332).

The spelling of 12221211122111 in words is "twelve trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred eleven".