921330340109 has 2 divisors, whose sum is σ = 921330340110. Its totient is φ = 921330340108.

The previous prime is 921330340093. The next prime is 921330340157. The reversal of 921330340109 is 901043033129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653009448100 + 268320892009 = 808090^2 + 517997^2 .

It is a cyclic number.

It is not a de Polignac number, because 921330340109 - 2⁴ = 921330340093 is a prime.

It is a super-2 number, since 2×921330340109² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921350340109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460665170054 + 460665170055.

It is an arithmetic number, because the mean of its divisors is an integer number (460665170055).

Almost surely, 2^921330340109 is an apocalyptic number.

It is an amenable number.

921330340109 is a deficient number, since it is larger than the sum of its proper divisors (1).

921330340109 is an equidigital number, since it uses as much as digits as its factorization.

921330340109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 921330340109 in words is "nine hundred twenty-one billion, three hundred thirty million, three hundred forty thousand, one hundred nine".