12220111221111 has 20 divisors (see below), whose sum is σ = 18254829007272. Its totient is φ = 8146698434928.

The previous prime is 12220111221061. The next prime is 12220111221133. The reversal of 12220111221111 is 11112211102221.

It is a happy number.

12220111221111 is a `hidden beast` number, since 1 + 2 + 220 + 111 + 221 + 111 = 666.

It is not a de Polignac number, because 12220111221111 - 2⁹ = 12220111220599 is a prime.

It is a super-2 number, since 2×12220111221111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220111221011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27041560 + ... + 27489746.

Almost surely, 2^{12220111221111} is an apocalyptic number.

12220111221111 is a deficient number, since it is larger than the sum of its proper divisors (6034717786161).

12220111221111 is an equidigital number, since it uses as much as digits as its factorization.

12220111221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784812 (or 784803 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12220111221111 its reverse (11112211102221), we get a palindrome (23332322323332).

The spelling of 12220111221111 in words is "twelve trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".