11042111491 has 2 divisors, whose sum is σ = 11042111492. Its totient is φ = 11042111490.

The previous prime is 11042111447. The next prime is 11042111527. The reversal of 11042111491 is 19411124011.

It is a strong prime.

It is an emirp because it is prime and its reverse (19411124011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11042111491 - 2⁹ = 11042110979 is a prime.

It is not a weakly prime, because it can be changed into another prime (11042111441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521055745 + 5521055746.

It is an arithmetic number, because the mean of its divisors is an integer number (5521055746).

Almost surely, 2^11042111491 is an apocalyptic number.

11042111491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11042111491 is an equidigital number, since it uses as much as digits as its factorization.

11042111491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 11042111491 in words is "eleven billion, forty-two million, one hundred eleven thousand, four hundred ninety-one".