11011111110 has 32 divisors (see below), whose sum is σ = 29362963680. Its totient is φ = 2936296224.

The previous prime is 11011111051. The next prime is 11011111117. The reversal of 11011111110 is 1111111011.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11011111092 and 11011111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20390677 + ... + 20391216.

It is an arithmetic number, because the mean of its divisors is an integer number (917592615).

Almost surely, 2^11011111110 is an apocalyptic number.

11011111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11011111110 is an abundant number, since it is smaller than the sum of its proper divisors (18351852570).

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

11011111110 is a wasteful number, since it uses less digits than its factorization.

11011111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40781909 (or 40781903 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11011111110 its reverse (1111111011), we get a palindrome (12122222121).

Subtracting from 11011111110 its reverse (1111111011), we obtain a palindrome (9900000099).

The spelling of 11011111110 in words is "eleven billion, eleven million, one hundred eleven thousand, one hundred ten".