210002101 has 4 divisors (see below), whose sum is σ = 211339852.
Its totient is φ = 208664352.
The previous prime is 210002099. The next prime is 210002119. The reversal of 210002101 is 101200012.
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 121660900 + 88341201 = 11030^2 + 9399^2
It is a cyclic number.
It is not a de Polignac number, because 210002101 - 21 = 210002099 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (210002141) 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 3 ways as a sum of consecutive naturals, for example, 668640 + ... + 668953.
It is an arithmetic number, because the mean of its divisors is an integer number (52834963).
Almost surely, 2210002101 is an apocalyptic number.
It is an amenable number.
210002101 is a deficient number, since it is larger than the sum of its proper divisors (1337751).
210002101 is a wasteful number, since it uses less digits than its factorization.
210002101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1337750.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 210002101 is about 14491.4492373951.
The cubic root of 210002101 is about 594.3941775205.
Adding to 210002101 its reverse (101200012), we get a palindrome (311202113).
The spelling of 210002101 in words is "two hundred ten million, two thousand, one hundred one".