10021000091 has 2 divisors, whose sum is σ = 10021000092. Its totient is φ = 10021000090.

The previous prime is 10021000061. The next prime is 10021000127. The reversal of 10021000091 is 19000012001.

10021000091 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 a de Polignac number, because none of the positive numbers 2^k-10021000091 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021000061) 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, 5010500045 + 5010500046.

It is an arithmetic number, because the mean of its divisors is an integer number (5010500046).

Almost surely, 2^10021000091 is an apocalyptic number.

10021000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021000091 is an equidigital number, since it uses as much as digits as its factorization.

10021000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 10021000091 its reverse (19000012001), we get a palindrome (29021012092).

The spelling of 10021000091 in words is "ten billion, twenty-one million, ninety-one", and thus it is an aban number and an uban number.