13111220511055 has 16 divisors (see below), whose sum is σ = 15737388224544. Its totient is φ = 10486361047680.

The previous prime is 13111220511049. The next prime is 13111220511071. The reversal of 13111220511055 is 55011502211131.

13111220511055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-13111220511055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493687837 + ... + 493714393.

It is an arithmetic number, because the mean of its divisors is an integer number (983586764034).

Almost surely, 2^{13111220511055} is an apocalyptic number.

13111220511055 is a deficient number, since it is larger than the sum of its proper divisors (2626167713489).

13111220511055 is a wasteful number, since it uses less digits than its factorization.

13111220511055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47466.

The product of its (nonzero) digits is 1500, while the sum is 28.

Adding to 13111220511055 its reverse (55011502211131), we get a palindrome (68122722722186).

The spelling of 13111220511055 in words is "thirteen trillion, one hundred eleven billion, two hundred twenty million, five hundred eleven thousand, fifty-five".