2001211202191 has 2 divisors, whose sum is σ = 2001211202192. Its totient is φ = 2001211202190.

The previous prime is 2001211202149. The next prime is 2001211202231. The reversal of 2001211202191 is 1912021121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001211202191 - 2⁹ = 2001211201679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001211202141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000605601095 + 1000605601096.

It is an arithmetic number, because the mean of its divisors is an integer number (1000605601096).

Almost surely, 2^{2001211202191} is an apocalyptic number.

2001211202191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001211202191 is an equidigital number, since it uses as much as digits as its factorization.

2001211202191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 2001211202191 its reverse (1912021121002), we get a palindrome (3913232323193).

The spelling of 2001211202191 in words is "two trillion, one billion, two hundred eleven million, two hundred two thousand, one hundred ninety-one".