200120211971 has 2 divisors, whose sum is σ = 200120211972. Its totient is φ = 200120211970.

The previous prime is 200120211959. The next prime is 200120212049. The reversal of 200120211971 is 179112021002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200120211971 - 2¹⁰ = 200120210947 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200120211971.

It is not a weakly prime, because it can be changed into another prime (200120211371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060105985 + 100060105986.

It is an arithmetic number, because the mean of its divisors is an integer number (100060105986).

Almost surely, 2^200120211971 is an apocalyptic number.

200120211971 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120211971 is an equidigital number, since it uses as much as digits as its factorization.

200120211971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

Adding to 200120211971 its reverse (179112021002), we get a palindrome (379232232973).

The spelling of 200120211971 in words is "two hundred billion, one hundred twenty million, two hundred eleven thousand, nine hundred seventy-one".