11111121202187 has 2 divisors, whose sum is σ = 11111121202188. Its totient is φ = 11111121202186.

The previous prime is 11111121202171. The next prime is 11111121202249. The reversal of 11111121202187 is 78120212111111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78120212111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111121202187 - 2⁴ = 11111121202171 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111121202087) 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, 5555560601093 + 5555560601094.

It is an arithmetic number, because the mean of its divisors is an integer number (5555560601094).

Almost surely, 2^{11111121202187} is an apocalyptic number.

11111121202187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111121202187 is an equidigital number, since it uses as much as digits as its factorization.

11111121202187 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 29.

Adding to 11111121202187 its reverse (78120212111111), we get a palindrome (89231333313298).

The spelling of 11111121202187 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-one million, two hundred two thousand, one hundred eighty-seven".