100202021010991 has 2 divisors, whose sum is σ = 100202021010992. Its totient is φ = 100202021010990.

The previous prime is 100202021010977. The next prime is 100202021011033. The reversal of 100202021010991 is 199010120202001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100202021010991 - 2⁷ = 100202021010863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100202022010991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50101010505495 + 50101010505496.

It is an arithmetic number, because the mean of its divisors is an integer number (50101010505496).

Almost surely, 2^{100202021010991} is an apocalyptic number.

100202021010991 is a deficient number, since it is larger than the sum of its proper divisors (1).

100202021010991 is an equidigital number, since it uses as much as digits as its factorization.

100202021010991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

Adding to 100202021010991 its reverse (199010120202001), we get a palindrome (299212141212992).

The spelling of 100202021010991 in words is "one hundred trillion, two hundred two billion, twenty-one million, ten thousand, nine hundred ninety-one".