210340330421 has 8 divisors (see below), whose sum is σ = 239845082904. Its totient is φ = 182739110400.

The previous prime is 210340330351. The next prime is 210340330427. The reversal of 210340330421 is 124033043012.

It can be written as a sum of positive squares in 4 ways, for example, as 20605167025 + 189735163396 = 143545^2 + 435586^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210340330421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210340330427) 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, 475882880 + ... + 475883321.

It is an arithmetic number, because the mean of its divisors is an integer number (29980635363).

Almost surely, 2^210340330421 is an apocalyptic number.

It is an amenable number.

210340330421 is a deficient number, since it is larger than the sum of its proper divisors (29504752483).

210340330421 is a wasteful number, since it uses less digits than its factorization.

210340330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951766231.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 210340330421 its reverse (124033043012), we get a palindrome (334373373433).

The spelling of 210340330421 in words is "two hundred ten billion, three hundred forty million, three hundred thirty thousand, four hundred twenty-one".