2100201 has 4 divisors (see below), whose sum is σ = 2800272.
Its totient is φ = 1400132.
The previous prime is 2100193. The next prime is 2100221. The reversal of 2100201 is 1020012.
Adding to 2100201 its reverse (1020012), we get a palindrome (3120213).
It is a happy number.
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 2100201 - 23 = 2100193 is a prime.
It is a D-number.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 2100201.
It is not an unprimeable number, because it can be changed into a prime (2100221) 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, 350031 + ... + 350036.
It is an arithmetic number, because the mean of its divisors is an integer number (700068).
22100201 is an apocalyptic number.
It is an amenable number.
2100201 is a deficient number, since it is larger than the sum of its proper divisors (700071).
2100201 is an equidigital number, since it uses as much as digits as its factorization.
2100201 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 700070.
The product of its (nonzero) digits is 4, while the sum is 6.
The square root of 2100201 is about 1449.2070245483.
The cubic root of 2100201 is about 128.0620020257.
The spelling of 2100201 in words is "two million, one hundred thousand, two hundred one".