2102011021987 has 2 divisors, whose sum is σ = 2102011021988. Its totient is φ = 2102011021986.

The previous prime is 2102011021919. The next prime is 2102011021997. The reversal of 2102011021987 is 7891201102012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102011021987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102011021997) 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, 1051005510993 + 1051005510994.

It is an arithmetic number, because the mean of its divisors is an integer number (1051005510994).

Almost surely, 2^{2102011021987} is an apocalyptic number.

2102011021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102011021987 is an equidigital number, since it uses as much as digits as its factorization.

2102011021987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

Adding to 2102011021987 its reverse (7891201102012), we get a palindrome (9993212123999).

The spelling of 2102011021987 in words is "two trillion, one hundred two billion, eleven million, twenty-one thousand, nine hundred eighty-seven".