21022100001191 has 2 divisors, whose sum is σ = 21022100001192. Its totient is φ = 21022100001190.

The previous prime is 21022100001151. The next prime is 21022100001239. The reversal of 21022100001191 is 19110000122012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022100001191 - 2³⁰ = 21021026259367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022100001101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511050000595 + 10511050000596.

It is an arithmetic number, because the mean of its divisors is an integer number (10511050000596).

Almost surely, 2^{21022100001191} is an apocalyptic number.

21022100001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022100001191 is an equidigital number, since it uses as much as digits as its factorization.

21022100001191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 21022100001191 in words is "twenty-one trillion, twenty-two billion, one hundred million, one thousand, one hundred ninety-one".