11001001001971 has 2 divisors, whose sum is σ = 11001001001972. Its totient is φ = 11001001001970.

The previous prime is 11001001001941. The next prime is 11001001002011. The reversal of 11001001001971 is 17910010010011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11001001001971 - 2²³ = 11000992613363 is a prime.

It is not a weakly prime, because it can be changed into another prime (11001001001941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500500500985 + 5500500500986.

It is an arithmetic number, because the mean of its divisors is an integer number (5500500500986).

Almost surely, 2^{11001001001971} is an apocalyptic number.

11001001001971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001001001971 is an equidigital number, since it uses as much as digits as its factorization.

11001001001971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 22.

Adding to 11001001001971 its reverse (17910010010011), we get a palindrome (28911011011982).

The spelling of 11001001001971 in words is "eleven trillion, one billion, one million, one thousand, nine hundred seventy-one".