5511111011131 has 4 divisors (see below), whose sum is σ = 6012121103064. Its totient is φ = 5010100919200.

The previous prime is 5511111011123. The next prime is 5511111011191. The reversal of 5511111011131 is 1311101111155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5511111011131 - 2³ = 5511111011123 is a prime.

It is a super-2 number, since 2×5511111011131² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5511111011191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250505045950 + ... + 250505045971.

It is an arithmetic number, because the mean of its divisors is an integer number (1503030275766).

Almost surely, 2^{5511111011131} is an apocalyptic number.

5511111011131 is a deficient number, since it is larger than the sum of its proper divisors (501010091933).

5511111011131 is a wasteful number, since it uses less digits than its factorization.

5511111011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501010091932.

The product of its (nonzero) digits is 75, while the sum is 22.

Adding to 5511111011131 its reverse (1311101111155), we get a palindrome (6822212122286).

The spelling of 5511111011131 in words is "five trillion, five hundred eleven billion, one hundred eleven million, eleven thousand, one hundred thirty-one".