11111011111012 has 12 divisors (see below), whose sum is σ = 19479178369980. Its totient is φ = 5545531576736.

The previous prime is 11111011110937. The next prime is 11111011111043. The reversal of 11111011111012 is 21011111011111.

It can be written as a sum of positive squares in 2 ways, for example, as 404870054436 + 10706141056576 = 636294^2 + 3272024^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11111011110983 and 11111011111001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2493492187 + ... + 2493496642.

It is an arithmetic number, because the mean of its divisors is an integer number (1623264864165).

Almost surely, 2^{11111011111012} is an apocalyptic number.

It is an amenable number.

11111011111012 is a deficient number, since it is larger than the sum of its proper divisors (8368167258968).

11111011111012 is a wasteful number, since it uses less digits than its factorization.

11111011111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986989390 (or 4986989388 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 11111011111012 its reverse (21011111011111), we get a palindrome (32122122122123).

Subtracting 11111011111012 from its reverse (21011111011111), we obtain a palindrome (9900099900099).

The spelling of 11111011111012 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, twelve".