11111110111138 has 48 divisors (see below), whose sum is σ = 17230209796800. Its totient is φ = 5373651689280.

The previous prime is 11111110111081. The next prime is 11111110111139. The reversal of 11111110111138 is 83111101111111.

It is not an unprimeable number, because it can be changed into a prime (11111110111139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322708108 + ... + 322742536.

It is an arithmetic number, because the mean of its divisors is an integer number (358962704100).

Almost surely, 2^{11111110111138} is an apocalyptic number.

11111110111138 is a deficient number, since it is larger than the sum of its proper divisors (6119099685662).

11111110111138 is a wasteful number, since it uses less digits than its factorization.

11111110111138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35195 (or 35158 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 22.

Adding to 11111110111138 its reverse (83111101111111), we get a palindrome (94222211222249).

The spelling of 11111110111138 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, one hundred eleven thousand, one hundred thirty-eight".