20002001121247 has 2 divisors, whose sum is σ = 20002001121248. Its totient is φ = 20002001121246.

The previous prime is 20002001121163. The next prime is 20002001121253. The reversal of 20002001121247 is 74212110020002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20002001121247 - 2²³ = 20001992732639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002001122247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001000560623 + 10001000560624.

It is an arithmetic number, because the mean of its divisors is an integer number (10001000560624).

Almost surely, 2^{20002001121247} is an apocalyptic number.

20002001121247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002001121247 is an equidigital number, since it uses as much as digits as its factorization.

20002001121247 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 20002001121247 its reverse (74212110020002), we get a palindrome (94214111141249).

The spelling of 20002001121247 in words is "twenty trillion, two billion, one million, one hundred twenty-one thousand, two hundred forty-seven".