2126001091 has 2 divisors, whose sum is σ = 2126001092. Its totient is φ = 2126001090.

The previous prime is 2126001043. The next prime is 2126001109. The reversal of 2126001091 is 1901006212.

Together with next prime (2126001109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2126001091 - 2¹³ = 2125992899 is a prime.

It is not a weakly prime, because it can be changed into another prime (2126001191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063000545 + 1063000546.

It is an arithmetic number, because the mean of its divisors is an integer number (1063000546).

Almost surely, 2^2126001091 is an apocalyptic number.

2126001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126001091 is an equidigital number, since it uses as much as digits as its factorization.

2126001091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 2126001091 is about 46108.5793643656. The cubic root of 2126001091 is about 1285.8426527994.

The spelling of 2126001091 in words is "two billion, one hundred twenty-six million, one thousand, ninety-one".