11111012111 has 8 divisors (see below), whose sum is σ = 11355747264. Its totient is φ = 10866624160.

The previous prime is 11111012093. The next prime is 11111012153. The reversal of 11111012111 is 11121011111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111012111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111012092 and 11111012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111012161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21560 + ... + 150621.

It is an arithmetic number, because the mean of its divisors is an integer number (1419468408).

Almost surely, 2^11111012111 is an apocalyptic number.

11111012111 is a deficient number, since it is larger than the sum of its proper divisors (244735153).

11111012111 is a wasteful number, since it uses less digits than its factorization.

11111012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173601.

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

Adding to 11111012111 its reverse (11121011111), we get a palindrome (22232023222).

The spelling of 11111012111 in words is "eleven billion, one hundred eleven million, twelve thousand, one hundred eleven".