210102001 has 4 divisors (see below), whose sum is σ = 212761600. Its totient is φ = 207442404.

The previous prime is 210101977. The next prime is 210102037. The reversal of 210102001 is 100201012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210102001 - 2¹³ = 210093809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210102041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329681 + ... + 1329838.

It is an arithmetic number, because the mean of its divisors is an integer number (53190400).

Almost surely, 2^210102001 is an apocalyptic number.

It is an amenable number.

210102001 is a deficient number, since it is larger than the sum of its proper divisors (2659599).

210102001 is an equidigital number, since it uses as much as digits as its factorization.

210102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659598.

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

The square root of 210102001 is about 14494.8956877930. The cubic root of 210102001 is about 594.4884155697.

Adding to 210102001 its reverse (100201012), we get a palindrome (310303013).

The spelling of 210102001 in words is "two hundred ten million, one hundred two thousand, one".