11131029991 has 2 divisors, whose sum is σ = 11131029992. Its totient is φ = 11131029990.

The previous prime is 11131029941. The next prime is 11131030019. The reversal of 11131029991 is 19992013111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131029991 - 2¹⁹ = 11130505703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11131029991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131029941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565514995 + 5565514996.

It is an arithmetic number, because the mean of its divisors is an integer number (5565514996).

Almost surely, 2^11131029991 is an apocalyptic number.

11131029991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131029991 is an equidigital number, since it uses as much as digits as its factorization.

11131029991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 37.

The spelling of 11131029991 in words is "eleven billion, one hundred thirty-one million, twenty-nine thousand, nine hundred ninety-one".