11131332691 has 2 divisors, whose sum is σ = 11131332692. Its totient is φ = 11131332690.

The previous prime is 11131332649. The next prime is 11131332721. The reversal of 11131332691 is 19623313111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131332691 - 2¹¹ = 11131330643 is a prime.

It is not a weakly prime, because it can be changed into another prime (11131332601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565666345 + 5565666346.

It is an arithmetic number, because the mean of its divisors is an integer number (5565666346).

Almost surely, 2^11131332691 is an apocalyptic number.

11131332691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131332691 is an equidigital number, since it uses as much as digits as its factorization.

11131332691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The spelling of 11131332691 in words is "eleven billion, one hundred thirty-one million, three hundred thirty-two thousand, six hundred ninety-one".