1000020101191 has 2 divisors, whose sum is σ = 1000020101192. Its totient is φ = 1000020101190.

The previous prime is 1000020101177. The next prime is 1000020101209. The reversal of 1000020101191 is 1911010200001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000020101191 - 2¹³ = 1000020092999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000020101111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010050595 + 500010050596.

It is an arithmetic number, because the mean of its divisors is an integer number (500010050596).

Almost surely, 2^{1000020101191} is an apocalyptic number.

1000020101191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000020101191 is an equidigital number, since it uses as much as digits as its factorization.

1000020101191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1000020101191 its reverse (1911010200001), we get a palindrome (2911030301192).

The spelling of 1000020101191 in words is "one trillion, twenty million, one hundred one thousand, one hundred ninety-one".