100021100191 has 2 divisors, whose sum is σ = 100021100192. Its totient is φ = 100021100190.

The previous prime is 100021100173. The next prime is 100021100203. The reversal of 100021100191 is 191001120001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100021100191 - 2⁹ = 100021099679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021100591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010550095 + 50010550096.

It is an arithmetic number, because the mean of its divisors is an integer number (50010550096).

Almost surely, 2^100021100191 is an apocalyptic number.

100021100191 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021100191 is an equidigital number, since it uses as much as digits as its factorization.

100021100191 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 16.

Adding to 100021100191 its reverse (191001120001), we get a palindrome (291022220192).

The spelling of 100021100191 in words is "one hundred billion, twenty-one million, one hundred thousand, one hundred ninety-one".