20001210120247 has 2 divisors, whose sum is σ = 20001210120248. Its totient is φ = 20001210120246.

The previous prime is 20001210120191. The next prime is 20001210120289. The reversal of 20001210120247 is 74202101210002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001210120247 - 2¹¹ = 20001210118199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001210180247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605060123 + 10000605060124.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605060124).

Almost surely, 2^{20001210120247} is an apocalyptic number.

20001210120247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210120247 is an equidigital number, since it uses as much as digits as its factorization.

20001210120247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 20001210120247 its reverse (74202101210002), we get a palindrome (94203311330249).

The spelling of 20001210120247 in words is "twenty trillion, one billion, two hundred ten million, one hundred twenty thousand, two hundred forty-seven".