11111020111111 has 2 divisors, whose sum is σ = 11111020111112. Its totient is φ = 11111020111110.

The previous prime is 11111020111099. The next prime is 11111020111123. The reversal of 11111020111111 is 11111102011111.

It is a balanced prime because it is at equal distance from previous prime (11111020111099) and next prime (11111020111123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111020111111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111020111091 and 11111020111100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111020181111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555510055555 + 5555510055556.

It is an arithmetic number, because the mean of its divisors is an integer number (5555510055556).

Almost surely, 2^{11111020111111} is an apocalyptic number.

11111020111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111020111111 is an equidigital number, since it uses as much as digits as its factorization.

11111020111111 is an evil number, because the sum of its binary digits is even.

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

Adding to 11111020111111 its reverse (11111102011111), we get a palindrome (22222122122222).

The spelling of 11111020111111 in words is "eleven trillion, one hundred eleven billion, twenty million, one hundred eleven thousand, one hundred eleven".