2021002101191 has 2 divisors, whose sum is σ = 2021002101192. Its totient is φ = 2021002101190.

The previous prime is 2021002101187. The next prime is 2021002101193. The reversal of 2021002101191 is 1911012001202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021002101191 - 2² = 2021002101187 is a prime.

Together with 2021002101193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021002101193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010501050595 + 1010501050596.

It is an arithmetic number, because the mean of its divisors is an integer number (1010501050596).

Almost surely, 2^{2021002101191} is an apocalyptic number.

2021002101191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021002101191 is an equidigital number, since it uses as much as digits as its factorization.

2021002101191 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021002101191 its reverse (1911012001202), we get a palindrome (3932014102393).

The spelling of 2021002101191 in words is "two trillion, twenty-one billion, two million, one hundred one thousand, one hundred ninety-one".