209120001 has 8 divisors (see below), whose sum is σ = 279438624. Its totient is φ = 139107360.

The previous prime is 209119943. The next prime is 209120027. The reversal of 209120001 is 100021902.

It is a happy number.

209120001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209120001 - 2¹⁰ = 209118977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209120701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74895 + ... + 77636.

It is an arithmetic number, because the mean of its divisors is an integer number (34929828).

Almost surely, 2^209120001 is an apocalyptic number.

It is an amenable number.

209120001 is a deficient number, since it is larger than the sum of its proper divisors (70318623).

209120001 is a wasteful number, since it uses less digits than its factorization.

209120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152991.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 209120001 is about 14460.9820205960. The cubic root of 209120001 is about 593.5607716697.

Adding to 209120001 its reverse (100021902), we get a palindrome (309141903).

The spelling of 209120001 in words is "two hundred nine million, one hundred twenty thousand, one".