10910920921909 has 2 divisors, whose sum is σ = 10910920921910. Its totient is φ = 10910920921908.

The previous prime is 10910920921871. The next prime is 10910920921921. The reversal of 10910920921909 is 90912902901901.

10910920921909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5749550343684 + 5161370578225 = 2397822^2 + 2271865^2 .

It is an emirp because it is prime and its reverse (90912902901901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10910920921909 - 2⁷ = 10910920921781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10910920921309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5455460460954 + 5455460460955.

It is an arithmetic number, because the mean of its divisors is an integer number (5455460460955).

Almost surely, 2^{10910920921909} is an apocalyptic number.

It is an amenable number.

10910920921909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10910920921909 is an equidigital number, since it uses as much as digits as its factorization.

10910920921909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 52.

The spelling of 10910920921909 in words is "ten trillion, nine hundred ten billion, nine hundred twenty million, nine hundred twenty-one thousand, nine hundred nine".