12002221111 has 4 divisors (see below), whose sum is σ = 12002441824. Its totient is φ = 12002000400.

The previous prime is 12002221081. The next prime is 12002221139. The reversal of 12002221111 is 11112220021.

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 12002221111 - 2⁵ = 12002221079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002221091 and 12002221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002251111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35266 + ... + 158896.

It is an arithmetic number, because the mean of its divisors is an integer number (3000610456).

Almost surely, 2^12002221111 is an apocalyptic number.

12002221111 is a deficient number, since it is larger than the sum of its proper divisors (220713).

12002221111 is an equidigital number, since it uses as much as digits as its factorization.

12002221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220712.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12002221111 its reverse (11112220021), we get a palindrome (23114441132).

The spelling of 12002221111 in words is "twelve billion, two million, two hundred twenty-one thousand, one hundred eleven".