421203113 has 4 divisors (see below), whose sum is σ = 421259988. Its totient is φ = 421146240.

The previous prime is 421203073. The next prime is 421203131. The reversal of 421203113 is 311302124.

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 338265664 + 82937449 = 18392^2 + 9107^2 .

It is a cyclic number.

It is not a de Polignac number, because 421203113 - 2¹² = 421199017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421203091 and 421203100.

It is not an unprimeable number, because it can be changed into a prime (421203173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15308 + ... + 32813.

It is an arithmetic number, because the mean of its divisors is an integer number (105314997).

Almost surely, 2^421203113 is an apocalyptic number.

It is an amenable number.

421203113 is a deficient number, since it is larger than the sum of its proper divisors (56875).

421203113 is an equidigital number, since it uses as much as digits as its factorization.

421203113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56874.

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

The square root of 421203113 is about 20523.2334928003. The cubic root of 421203113 is about 749.6016331834.

Adding to 421203113 its reverse (311302124), we get a palindrome (732505237).

The spelling of 421203113 in words is "four hundred twenty-one million, two hundred three thousand, one hundred thirteen".