11012012111 has 4 divisors (see below), whose sum is σ = 11031097632. Its totient is φ = 10992926592.

The previous prime is 11012012071. The next prime is 11012012119. The reversal of 11012012111 is 11121021011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11012012111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012012092 and 11012012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012012119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9541895 + ... + 9543048.

It is an arithmetic number, because the mean of its divisors is an integer number (2757774408).

Almost surely, 2^11012012111 is an apocalyptic number.

11012012111 is a deficient number, since it is larger than the sum of its proper divisors (19085521).

11012012111 is an equidigital number, since it uses as much as digits as its factorization.

11012012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19085520.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11012012111 its reverse (11121021011), we get a palindrome (22133033122).

The spelling of 11012012111 in words is "eleven billion, twelve million, twelve thousand, one hundred eleven".