421133201 has 4 divisors (see below), whose sum is σ = 421191972. Its totient is φ = 421074432.

The previous prime is 421133183. The next prime is 421133213. The reversal of 421133201 is 102331124.

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 207388801 + 213744400 = 14401^2 + 14620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421133201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421133201.

It is not an unprimeable number, because it can be changed into a prime (421133101) 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, 16856 + ... + 33561.

It is an arithmetic number, because the mean of its divisors is an integer number (105297993).

Almost surely, 2^421133201 is an apocalyptic number.

It is an amenable number.

421133201 is a deficient number, since it is larger than the sum of its proper divisors (58771).

421133201 is an equidigital number, since it uses as much as digits as its factorization.

421133201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58770.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 421133201 is about 20521.5301817384. The cubic root of 421133201 is about 749.5601575093.

Adding to 421133201 its reverse (102331124), we get a palindrome (523464325).

The spelling of 421133201 in words is "four hundred twenty-one million, one hundred thirty-three thousand, two hundred one".