209009912001 has 16 divisors (see below), whose sum is σ = 304338917568. Its totient is φ = 126537465600.

The previous prime is 209009911991. The next prime is 209009912021. The reversal of 209009912001 is 100219900902.

It is not a de Polignac number, because 209009912001 - 2¹⁵ = 209009879233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (209009912021) 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 in 15 ways as a sum of consecutive naturals, for example, 3348820 + ... + 3410661.

It is an arithmetic number, because the mean of its divisors is an integer number (19021182348).

Almost surely, 2^209009912001 is an apocalyptic number.

It is an amenable number.

209009912001 is a deficient number, since it is larger than the sum of its proper divisors (95329005567).

209009912001 is a wasteful number, since it uses less digits than its factorization.

209009912001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760432.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 209009912001 in words is "two hundred nine billion, nine million, nine hundred twelve thousand, one".