11133231191 has 2 divisors, whose sum is σ = 11133231192. Its totient is φ = 11133231190.

The previous prime is 11133231139. The next prime is 11133231209. The reversal of 11133231191 is 19113233111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11133231191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11133231191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11133231391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5566615595 + 5566615596.

It is an arithmetic number, because the mean of its divisors is an integer number (5566615596).

Almost surely, 2^11133231191 is an apocalyptic number.

11133231191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11133231191 is an equidigital number, since it uses as much as digits as its factorization.

11133231191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The spelling of 11133231191 in words is "eleven billion, one hundred thirty-three million, two hundred thirty-one thousand, one hundred ninety-one".