12111210638018 has 16 divisors (see below), whose sum is σ = 19130592000960. Its totient is φ = 5739177595536.

The previous prime is 12111210637973. The next prime is 12111210638039. The reversal of 12111210638018 is 81083601211121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207734380 + ... + 1207744407.

It is an arithmetic number, because the mean of its divisors is an integer number (1195662000060).

Almost surely, 2^{12111210638018} is an apocalyptic number.

12111210638018 is a deficient number, since it is larger than the sum of its proper divisors (7019381362942).

12111210638018 is a wasteful number, since it uses less digits than its factorization.

12111210638018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415478921.

The product of its (nonzero) digits is 4608, while the sum is 35.

Adding to 12111210638018 its reverse (81083601211121), we get a palindrome (93194811849139).

The spelling of 12111210638018 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, six hundred thirty-eight thousand, eighteen".