211020203308987 has 2 divisors, whose sum is σ = 211020203308988. Its totient is φ = 211020203308986.

The previous prime is 211020203308979. The next prime is 211020203309021. The reversal of 211020203308987 is 789803302020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211020203308987 - 2³ = 211020203308979 is a prime.

It is not a weakly prime, because it can be changed into another prime (211020203306987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510101654493 + 105510101654494.

It is an arithmetic number, because the mean of its divisors is an integer number (105510101654494).

Almost surely, 2^{211020203308987} is an apocalyptic number.

211020203308987 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020203308987 is an equidigital number, since it uses as much as digits as its factorization.

211020203308987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 211020203308987 in words is "two hundred eleven trillion, twenty billion, two hundred three million, three hundred eight thousand, nine hundred eighty-seven".