11909901001 has 2 divisors, whose sum is σ = 11909901002. Its totient is φ = 11909901000.

The previous prime is 11909900993. The next prime is 11909901037. The reversal of 11909901001 is 10010990911.

11909901001 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 can be written as a sum of positive squares in only one way, i.e., 11539915776 + 369985225 = 107424^2 + 19235^2 .

It is an emirp because it is prime and its reverse (10010990911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11909901001 - 2³ = 11909900993 is a prime.

It is not a weakly prime, because it can be changed into another prime (11909901041) 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, 5954950500 + 5954950501.

It is an arithmetic number, because the mean of its divisors is an integer number (5954950501).

Almost surely, 2^11909901001 is an apocalyptic number.

It is an amenable number.

11909901001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11909901001 is an equidigital number, since it uses as much as digits as its factorization.

11909901001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 11909901001 in words is "eleven billion, nine hundred nine million, nine hundred one thousand, one".