55111411111 has 2 divisors, whose sum is σ = 55111411112. Its totient is φ = 55111411110.

The previous prime is 55111411097. The next prime is 55111411217. The reversal of 55111411111 is 11111411155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55111411111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55111411711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555705555 + 27555705556.

It is an arithmetic number, because the mean of its divisors is an integer number (27555705556).

Almost surely, 2^55111411111 is an apocalyptic number.

55111411111 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111411111 is an equidigital number, since it uses as much as digits as its factorization.

55111411111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100, while the sum is 22.

Adding to 55111411111 its reverse (11111411155), we get a palindrome (66222822266).

The spelling of 55111411111 in words is "fifty-five billion, one hundred eleven million, four hundred eleven thousand, one hundred eleven".