1002000122191 has 2 divisors, whose sum is σ = 1002000122192. Its totient is φ = 1002000122190.

The previous prime is 1002000122177. The next prime is 1002000122231. The reversal of 1002000122191 is 1912210002001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002000122191 - 2⁵ = 1002000122159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002000128191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501000061095 + 501000061096.

It is an arithmetic number, because the mean of its divisors is an integer number (501000061096).

Almost surely, 2^{1002000122191} is an apocalyptic number.

1002000122191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002000122191 is an equidigital number, since it uses as much as digits as its factorization.

1002000122191 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 19.

Adding to 1002000122191 its reverse (1912210002001), we get a palindrome (2914210124192).

The spelling of 1002000122191 in words is "one trillion, two billion, one hundred twenty-two thousand, one hundred ninety-one".