200121220209971 has 2 divisors, whose sum is σ = 200121220209972. Its totient is φ = 200121220209970.

The previous prime is 200121220209847. The next prime is 200121220210097. The reversal of 200121220209971 is 179902022121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200121220209971 - 2⁴² = 195723173698867 is a prime.

It is not a weakly prime, because it can be changed into another prime (200121220209371) 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, 100060610104985 + 100060610104986.

It is an arithmetic number, because the mean of its divisors is an integer number (100060610104986).

Almost surely, 2^{200121220209971} is an apocalyptic number.

200121220209971 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121220209971 is an equidigital number, since it uses as much as digits as its factorization.

200121220209971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 200121220209971 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred nine thousand, nine hundred seventy-one".