11999988001 has 4 divisors (see below), whose sum is σ = 12035596612. Its totient is φ = 11964379392.

The previous prime is 11999987983. The next prime is 11999988017. The reversal of 11999988001 is 10088999911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6859814976 + 5140173025 = 82824^2 + 71695^2 .

It is a cyclic number.

It is not a de Polignac number, because 11999988001 - 2¹³ = 11999979809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11999988071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17803800 + ... + 17804473.

It is an arithmetic number, because the mean of its divisors is an integer number (3008899153).

Almost surely, 2^11999988001 is an apocalyptic number.

It is an amenable number.

11999988001 is a deficient number, since it is larger than the sum of its proper divisors (35608611).

11999988001 is an equidigital number, since it uses as much as digits as its factorization.

11999988001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35608610.

The product of its (nonzero) digits is 419904, while the sum is 55.

It can be divided in two parts, 11999 and 988001, that added together give a 6-th power (1000000 = 10⁶).

The spelling of 11999988001 in words is "eleven billion, nine hundred ninety-nine million, nine hundred eighty-eight thousand, one".