111011211211138 has 128 divisors (see below), whose sum is σ = 212431480865280. Its totient is φ = 42355585843200.

The previous prime is 111011211211123. The next prime is 111011211211139. The reversal of 111011211211138 is 831112112110111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111011211211139) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8636981920 + ... + 8636994772.

It is an arithmetic number, because the mean of its divisors is an integer number (1659620944260).

Almost surely, 2^{111011211211138} is an apocalyptic number.

111011211211138 is a deficient number, since it is larger than the sum of its proper divisors (101420269654142).

111011211211138 is a wasteful number, since it uses less digits than its factorization.

111011211211138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692.

The product of its (nonzero) digits is 96, while the sum is 25.

Adding to 111011211211138 its reverse (831112112110111), we get a palindrome (942123323321249).

The spelling of 111011211211138 in words is "one hundred eleven trillion, eleven billion, two hundred eleven million, two hundred eleven thousand, one hundred thirty-eight".