10201210011991 has 2 divisors, whose sum is σ = 10201210011992. Its totient is φ = 10201210011990.

The previous prime is 10201210011913. The next prime is 10201210012039. The reversal of 10201210011991 is 19911001210201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10201210011991 - 2⁹ = 10201210011479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10201210011791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100605005995 + 5100605005996.

It is an arithmetic number, because the mean of its divisors is an integer number (5100605005996).

Almost surely, 2^{10201210011991} is an apocalyptic number.

10201210011991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201210011991 is an equidigital number, since it uses as much as digits as its factorization.

10201210011991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 10201210011991 in words is "ten trillion, two hundred one billion, two hundred ten million, eleven thousand, nine hundred ninety-one".