11111111110 has 64 divisors (see below), whose sum is σ = 22435273728. Its totient is φ = 3926880000.

The previous prime is 11111111059. The next prime is 11111111113. The reversal of 11111111110 is 1111111111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111111113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1217665 + ... + 1226755.

It is an arithmetic number, because the mean of its divisors is an integer number (350551152).

Almost surely, 2^11111111110 is an apocalyptic number.

11111111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111111110 is an abundant number, since it is smaller than the sum of its proper divisors (11324162618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111111110 is a wasteful number, since it uses less digits than its factorization.

11111111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421.

The product of its (nonzero) digits is 1, while the sum is 10.

11111111110 divided by its sum of digits (10) gives a palindrome (1111111111).

Adding to 11111111110 its reverse (1111111111), we get a palindrome (12222222221).

Subtracting from 11111111110 its reverse (1111111111), we obtain a palindrome (9999999999).

It can be divided in two parts, 111111 and 11110, that added together give a palindrome (122221).

The spelling of 11111111110 in words is "eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred ten".