200021101069991 has 2 divisors, whose sum is σ = 200021101069992. Its totient is φ = 200021101069990.

The previous prime is 200021101069973. The next prime is 200021101070029. The reversal of 200021101069991 is 199960101120002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200021101069991 - 2²⁶ = 200021033961127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021101069961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010550534995 + 100010550534996.

It is an arithmetic number, because the mean of its divisors is an integer number (100010550534996).

Almost surely, 2^{200021101069991} is an apocalyptic number.

200021101069991 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021101069991 is an equidigital number, since it uses as much as digits as its factorization.

200021101069991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 41.

Adding to 200021101069991 its reverse (199960101120002), we get a palindrome (399981202189993).

The spelling of 200021101069991 in words is "two hundred trillion, twenty-one billion, one hundred one million, sixty-nine thousand, nine hundred ninety-one".