11131112987 has 2 divisors, whose sum is σ = 11131112988. Its totient is φ = 11131112986.

The previous prime is 11131112953. The next prime is 11131113023. The reversal of 11131112987 is 78921113111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11131112987 - 2⁸ = 11131112731 is a prime.

It is not a weakly prime, because it can be changed into another prime (11131112387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565556493 + 5565556494.

It is an arithmetic number, because the mean of its divisors is an integer number (5565556494).

Almost surely, 2^11131112987 is an apocalyptic number.

11131112987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131112987 is an equidigital number, since it uses as much as digits as its factorization.

11131112987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 35.

The spelling of 11131112987 in words is "eleven billion, one hundred thirty-one million, one hundred twelve thousand, nine hundred eighty-seven".