100200221021987 has 2 divisors, whose sum is σ = 100200221021988. Its totient is φ = 100200221021986.

The previous prime is 100200221021969. The next prime is 100200221022007. The reversal of 100200221021987 is 789120122002001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100200221021987 - 2¹² = 100200221017891 is a prime.

It is not a weakly prime, because it can be changed into another prime (100200221027987) 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, 50100110510993 + 50100110510994.

It is an arithmetic number, because the mean of its divisors is an integer number (50100110510994).

Almost surely, 2^{100200221021987} is an apocalyptic number.

100200221021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

100200221021987 is an equidigital number, since it uses as much as digits as its factorization.

100200221021987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 100200221021987 its reverse (789120122002001), we get a palindrome (889320343023988).

The spelling of 100200221021987 in words is "one hundred trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, nine hundred eighty-seven".