10010020009991 has 2 divisors, whose sum is σ = 10010020009992. Its totient is φ = 10010020009990.

The previous prime is 10010020009981. The next prime is 10010020010117. The reversal of 10010020009991 is 19990002001001.

10010020009991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10010020009991 - 2¹⁴ = 10010019993607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10010020009921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005010004995 + 5005010004996.

It is an arithmetic number, because the mean of its divisors is an integer number (5005010004996).

Almost surely, 2^{10010020009991} is an apocalyptic number.

10010020009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010020009991 is an equidigital number, since it uses as much as digits as its factorization.

10010020009991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The spelling of 10010020009991 in words is "ten trillion, ten billion, twenty million, nine thousand, nine hundred ninety-one".