2002111987 has 2 divisors, whose sum is σ = 2002111988. Its totient is φ = 2002111986.

The previous prime is 2002111939. The next prime is 2002111997. The reversal of 2002111987 is 7891112002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2002111987 - 2²³ = 1993723379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002111997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001055993 + 1001055994.

It is an arithmetic number, because the mean of its divisors is an integer number (1001055994).

Almost surely, 2^2002111987 is an apocalyptic number.

2002111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002111987 is an equidigital number, since it uses as much as digits as its factorization.

2002111987 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 2002111987 is about 44744.9660520600. The cubic root of 2002111987 is about 1260.3643833588.

Adding to 2002111987 its reverse (7891112002), we get a palindrome (9893223989).

The spelling of 2002111987 in words is "two billion, two million, one hundred eleven thousand, nine hundred eighty-seven".