1122312187 has 2 divisors, whose sum is σ = 1122312188. Its totient is φ = 1122312186.

The previous prime is 1122312131. The next prime is 1122312199. The reversal of 1122312187 is 7812132211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122312187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122312887) 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, 561156093 + 561156094.

It is an arithmetic number, because the mean of its divisors is an integer number (561156094).

Almost surely, 2^1122312187 is an apocalyptic number.

1122312187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122312187 is an equidigital number, since it uses as much as digits as its factorization.

1122312187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 1122312187 is about 33500.9281513214. The cubic root of 1122312187 is about 1039.2129730411.

Adding to 1122312187 its reverse (7812132211), we get a palindrome (8934444398).

The spelling of 1122312187 in words is "one billion, one hundred twenty-two million, three hundred twelve thousand, one hundred eighty-seven".