11130991 has 2 divisors, whose sum is σ = 11130992. Its totient is φ = 11130990.

The previous prime is 11130989. The next prime is 11131019. The reversal of 11130991 is 19903111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11130991 - 2¹ = 11130989 is a prime.

Together with 11130989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11130391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565495 + 5565496.

It is an arithmetic number, because the mean of its divisors is an integer number (5565496).

Almost surely, 2^11130991 is an apocalyptic number.

11130991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11130991 is an equidigital number, since it uses as much as digits as its factorization.

11130991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11130991 is about 3336.3139840249. The cubic root of 11130991 is about 223.2773199295.

It can be divided in two parts, 11130 and 991, that added together give a palindrome (12121).

The spelling of 11130991 in words is "eleven million, one hundred thirty thousand, nine hundred ninety-one".