210421242321 has 8 divisors (see below), whose sum is σ = 282282894240. Its totient is φ = 139420209312.

The previous prime is 210421242301. The next prime is 210421242371. The reversal of 210421242321 is 123242124012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210421242321 - 2⁵ = 210421242289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210421242291 and 210421242300.

It is not an unprimeable number, because it can be changed into a prime (210421242301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215154156 + ... + 215155133.

It is an arithmetic number, because the mean of its divisors is an integer number (35285361780).

Almost surely, 2^210421242321 is an apocalyptic number.

It is an amenable number.

210421242321 is a deficient number, since it is larger than the sum of its proper divisors (71861651919).

210421242321 is a wasteful number, since it uses less digits than its factorization.

210421242321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430309455.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 210421242321 its reverse (123242124012), we get a palindrome (333663366333).

The spelling of 210421242321 in words is "two hundred ten billion, four hundred twenty-one million, two hundred forty-two thousand, three hundred twenty-one".