10100021010991 has 2 divisors, whose sum is σ = 10100021010992. Its totient is φ = 10100021010990.

The previous prime is 10100021010941. The next prime is 10100021011001. The reversal of 10100021010991 is 19901012000101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10100021010991 - 2¹⁷ = 10100020879919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10100021010901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050010505495 + 5050010505496.

It is an arithmetic number, because the mean of its divisors is an integer number (5050010505496).

Almost surely, 2^{10100021010991} is an apocalyptic number.

10100021010991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10100021010991 is an equidigital number, since it uses as much as digits as its factorization.

10100021010991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 10100021010991 in words is "ten trillion, one hundred billion, twenty-one million, ten thousand, nine hundred ninety-one".