2001120212291 has 2 divisors, whose sum is σ = 2001120212292. Its totient is φ = 2001120212290.

The previous prime is 2001120212249. The next prime is 2001120212293. The reversal of 2001120212291 is 1922120211002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001120212291 - 2¹⁸ = 2001119950147 is a prime.

Together with 2001120212293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2001120212293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000560106145 + 1000560106146.

It is an arithmetic number, because the mean of its divisors is an integer number (1000560106146).

Almost surely, 2^{2001120212291} is an apocalyptic number.

2001120212291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001120212291 is an equidigital number, since it uses as much as digits as its factorization.

2001120212291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 2001120212291 its reverse (1922120211002), we get a palindrome (3923240423293).

The spelling of 2001120212291 in words is "two trillion, one billion, one hundred twenty million, two hundred twelve thousand, two hundred ninety-one".