421100201 has 4 divisors (see below), whose sum is σ = 422907732. Its totient is φ = 419292672.

The previous prime is 421100191. The next prime is 421100221. The reversal of 421100201 is 102001124.

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 296666176 + 124434025 = 17224^2 + 11155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421100201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421100221) 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, 903416 + ... + 903881.

It is an arithmetic number, because the mean of its divisors is an integer number (105726933).

Almost surely, 2^421100201 is an apocalyptic number.

It is an amenable number.

421100201 is a deficient number, since it is larger than the sum of its proper divisors (1807531).

421100201 is a wasteful number, since it uses less digits than its factorization.

421100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807530.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 421100201 is about 20520.7261323765. The cubic root of 421100201 is about 749.5405784851.

Adding to 421100201 its reverse (102001124), we get a palindrome (523101325).

The spelling of 421100201 in words is "four hundred twenty-one million, one hundred thousand, two hundred one".