2000001021091 has 2 divisors, whose sum is σ = 2000001021092. Its totient is φ = 2000001021090.

The previous prime is 2000001021049. The next prime is 2000001021127. The reversal of 2000001021091 is 1901201000002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2000001021091 - 2⁹ = 2000001020579 is a prime.

It is not a weakly prime, because it can be changed into another prime (2000001021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000000510545 + 1000000510546.

It is an arithmetic number, because the mean of its divisors is an integer number (1000000510546).

Almost surely, 2^{2000001021091} is an apocalyptic number.

2000001021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000001021091 is an equidigital number, since it uses as much as digits as its factorization.

2000001021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 2000001021091 its reverse (1901201000002), we get a palindrome (3901202021093).

The spelling of 2000001021091 in words is "two trillion, one million, twenty-one thousand, ninety-one".