1122001987 has 2 divisors, whose sum is σ = 1122001988. Its totient is φ = 1122001986.

The previous prime is 1122001981. The next prime is 1122002009. The reversal of 1122001987 is 7891002211.

It is a weak prime.

It is an emirp because it is prime and its reverse (7891002211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122001987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122001981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561000993 + 561000994.

It is an arithmetic number, because the mean of its divisors is an integer number (561000994).

Almost surely, 2^1122001987 is an apocalyptic number.

1122001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122001987 is an equidigital number, since it uses as much as digits as its factorization.

1122001987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 1122001987 is about 33496.2981088956. The cubic root of 1122001987 is about 1039.1172202514.

The spelling of 1122001987 in words is "one billion, one hundred twenty-two million, one thousand, nine hundred eighty-seven".