421204143321 has 72 divisors (see below), whose sum is σ = 699234785496. Its totient is φ = 243369584640.

The previous prime is 421204143317. The next prime is 421204143383. The reversal of 421204143321 is 123341402124.

421204143321 is a `hidden beast` number, since 4 + 2 + 1 + 204 + 1 + 433 + 21 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 214865623296 + 206338520025 = 463536^2 + 454245^2 .

It is not a de Polignac number, because 421204143321 - 2² = 421204143317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421204143121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10866451 + ... + 10905143.

It is an arithmetic number, because the mean of its divisors is an integer number (9711594243).

Almost surely, 2^421204143321 is an apocalyptic number.

It is an amenable number.

421204143321 is a deficient number, since it is larger than the sum of its proper divisors (278030642175).

421204143321 is a wasteful number, since it uses less digits than its factorization.

421204143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39163 (or 39147 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 421204143321 its reverse (123341402124), we get a palindrome (544545545445).

The spelling of 421204143321 in words is "four hundred twenty-one billion, two hundred four million, one hundred forty-three thousand, three hundred twenty-one".