2100100987 has 2 divisors, whose sum is σ = 2100100988. Its totient is φ = 2100100986.

The previous prime is 2100100973. The next prime is 2100100993. The reversal of 2100100987 is 7890010012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100100987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100100927) 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, 1050050493 + 1050050494.

It is an arithmetic number, because the mean of its divisors is an integer number (1050050494).

Almost surely, 2^2100100987 is an apocalyptic number.

2100100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100100987 is an equidigital number, since it uses as much as digits as its factorization.

2100100987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 2100100987 is about 45826.8587948160. The cubic root of 2100100987 is about 1280.5996919359.

Adding to 2100100987 its reverse (7890010012), we get a palindrome (9990110999).

The spelling of 2100100987 in words is "two billion, one hundred million, one hundred thousand, nine hundred eighty-seven".