210120001 has 8 divisors (see below), whose sum is σ = 258609344. Its totient is φ = 166248720.

The previous prime is 210119989. The next prime is 210120041. The reversal of 210120001 is 100021012.

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

It is a cyclic number.

It is not a de Polignac number, because 210120001 - 2⁷ = 210119873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (210120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154415 + ... + 1154596.

It is an arithmetic number, because the mean of its divisors is an integer number (32326168).

Almost surely, 2^210120001 is an apocalyptic number.

It is an amenable number.

210120001 is a deficient number, since it is larger than the sum of its proper divisors (48489343).

210120001 is a wasteful number, since it uses less digits than its factorization.

210120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309031.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 210120001 is about 14495.5165827231. The cubic root of 210120001 is about 594.5053922220.

Adding to 210120001 its reverse (100021012), we get a palindrome (310141013).

The spelling of 210120001 in words is "two hundred ten million, one hundred twenty thousand, one".