12028181911 has 4 divisors (see below), whose sum is σ = 12034261800. Its totient is φ = 12022102024.

The previous prime is 12028181909. The next prime is 12028181941. The reversal of 12028181911 is 11918182021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11918182021 = 23 ⋅518181827.

It is a cyclic number.

It is not a de Polignac number, because 12028181911 - 2¹ = 12028181909 is a prime.

It is a super-2 number, since 2×12028181911² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12028181941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036976 + ... + 3040933.

It is an arithmetic number, because the mean of its divisors is an integer number (3008565450).

Almost surely, 2^12028181911 is an apocalyptic number.

12028181911 is a deficient number, since it is larger than the sum of its proper divisors (6079889).

12028181911 is an equidigital number, since it uses as much as digits as its factorization.

12028181911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079888.

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 12028181911 in words is "twelve billion, twenty-eight million, one hundred eighty-one thousand, nine hundred eleven".