10010019991 has 2 divisors, whose sum is σ = 10010019992. Its totient is φ = 10010019990.

The previous prime is 10010019979. The next prime is 10010020043. The reversal of 10010019991 is 19991001001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10010019991 - 2⁷ = 10010019863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10010019931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005009995 + 5005009996.

It is an arithmetic number, because the mean of its divisors is an integer number (5005009996).

Almost surely, 2^10010019991 is an apocalyptic number.

10010019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010019991 is an equidigital number, since it uses as much as digits as its factorization.

10010019991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 10010019991 in words is "ten billion, ten million, nineteen thousand, nine hundred ninety-one".