11105291999531 has 2 divisors, whose sum is σ = 11105291999532. Its totient is φ = 11105291999530.

The previous prime is 11105291999507. The next prime is 11105291999617. The reversal of 11105291999531 is 13599919250111.

It is a happy number.

11105291999531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13599919250111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11105291999531 - 2¹⁴ = 11105291983147 is a prime.

It is a super-2 number, since 2×11105291999531² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11105291909531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5552645999765 + 5552645999766.

It is an arithmetic number, because the mean of its divisors is an integer number (5552645999766).

Almost surely, 2^{11105291999531} is an apocalyptic number.

11105291999531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11105291999531 is an equidigital number, since it uses as much as digits as its factorization.

11105291999531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 984150, while the sum is 56.

The spelling of 11105291999531 in words is "eleven trillion, one hundred five billion, two hundred ninety-one million, nine hundred ninety-nine thousand, five hundred thirty-one".