421202110321 has 4 divisors (see below), whose sum is σ = 428341129200. Its totient is φ = 414063091444.

The previous prime is 421202110297. The next prime is 421202110333. The reversal of 421202110321 is 123011202124.

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 421202110321 - 2⁷ = 421202110193 is a prime.

It is a super-2 number, since 2×421202110321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421202110361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569509351 + ... + 3569509468.

It is an arithmetic number, because the mean of its divisors is an integer number (107085282300).

Almost surely, 2^421202110321 is an apocalyptic number.

It is an amenable number.

421202110321 is a deficient number, since it is larger than the sum of its proper divisors (7139018879).

421202110321 is an equidigital number, since it uses as much as digits as its factorization.

421202110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7139018878.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 421202110321 its reverse (123011202124), we get a palindrome (544213312445).

The spelling of 421202110321 in words is "four hundred twenty-one billion, two hundred two million, one hundred ten thousand, three hundred twenty-one".