921000001101091 has 2 divisors, whose sum is σ = 921000001101092. Its totient is φ = 921000001101090.

The previous prime is 921000001101071. The next prime is 921000001101121. The reversal of 921000001101091 is 190101100000129.

921000001101091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921000001101091 - 2³³ = 920991411166499 is a prime.

It is not a weakly prime, because it can be changed into another prime (921000001101071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460500000550545 + 460500000550546.

It is an arithmetic number, because the mean of its divisors is an integer number (460500000550546).

Almost surely, 2^{921000001101091} is an apocalyptic number.

921000001101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

921000001101091 is an equidigital number, since it uses as much as digits as its factorization.

921000001101091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 921000001101091 in words is "nine hundred twenty-one trillion, one million, one hundred one thousand, ninety-one".