20002122109987 has 2 divisors, whose sum is σ = 20002122109988. Its totient is φ = 20002122109986.

The previous prime is 20002122109969. The next prime is 20002122110011. The reversal of 20002122109987 is 78990122120002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20002122109987 - 2²⁷ = 20001987892259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20002122106987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001061054993 + 10001061054994.

It is an arithmetic number, because the mean of its divisors is an integer number (10001061054994).

Almost surely, 2^{20002122109987} is an apocalyptic number.

20002122109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002122109987 is an equidigital number, since it uses as much as digits as its factorization.

20002122109987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

Adding to 20002122109987 its reverse (78990122120002), we get a palindrome (98992244229989).

The spelling of 20002122109987 in words is "twenty trillion, two billion, one hundred twenty-two million, one hundred nine thousand, nine hundred eighty-seven".