11111211110 has 16 divisors (see below), whose sum is σ = 20004494400. Its totient is φ = 4443525696.

The previous prime is 11111211073. The next prime is 11111211121. The reversal of 11111211110 is 1111211111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111211091 and 11111211100.

It is a congruent number.

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, 70190 + ... + 164769.

It is an arithmetic number, because the mean of its divisors is an integer number (1250280900).

Almost surely, 2^11111211110 is an apocalyptic number.

11111211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111211110 is a deficient number, since it is larger than the sum of its proper divisors (8893283290).

11111211110 is a wasteful number, since it uses less digits than its factorization.

11111211110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239695.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11111211110 its reverse (1111211111), we get a palindrome (12222422221).

Subtracting from 11111211110 its reverse (1111211111), we obtain a palindrome (9999999999).

The spelling of 11111211110 in words is "eleven billion, one hundred eleven million, two hundred eleven thousand, one hundred ten".