420210240321 has 4 divisors (see below), whose sum is σ = 560280320432. Its totient is φ = 280140160212.

The previous prime is 420210240299. The next prime is 420210240337. The reversal of 420210240321 is 123042012024.

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 not a de Polignac number, because 420210240321 - 2¹⁰ = 420210239297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420210242321) 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, 70035040051 + ... + 70035040056.

It is an arithmetic number, because the mean of its divisors is an integer number (140070080108).

Almost surely, 2^420210240321 is an apocalyptic number.

It is an amenable number.

420210240321 is a deficient number, since it is larger than the sum of its proper divisors (140070080111).

420210240321 is a wasteful number, since it uses less digits than its factorization.

420210240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140070080110.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 420210240321 its reverse (123042012024), we get a palindrome (543252252345).

The spelling of 420210240321 in words is "four hundred twenty billion, two hundred ten million, two hundred forty thousand, three hundred twenty-one".