11112120287 has 2 divisors, whose sum is σ = 11112120288. Its totient is φ = 11112120286.

The previous prime is 11112120263. The next prime is 11112120323. The reversal of 11112120287 is 78202121111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78202121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11112120287 - 2⁸ = 11112120031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112120787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556060143 + 5556060144.

It is an arithmetic number, because the mean of its divisors is an integer number (5556060144).

Almost surely, 2^11112120287 is an apocalyptic number.

11112120287 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112120287 is an equidigital number, since it uses as much as digits as its factorization.

11112120287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 11112120287 its reverse (78202121111), we get a palindrome (89314241398).

The spelling of 11112120287 in words is "eleven billion, one hundred twelve million, one hundred twenty thousand, two hundred eighty-seven".