213210312321 has 16 divisors (see below), whose sum is σ = 286952388800. Its totient is φ = 140808699648.

The previous prime is 213210312311. The next prime is 213210312331. The reversal of 213210312321 is 123213012312.

It is an interprime number because it is at equal distance from previous prime (213210312311) and next prime (213210312331).

It is not a de Polignac number, because 213210312321 - 2¹⁸ = 213210050177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213210312311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368836 + ... + 749973.

It is an arithmetic number, because the mean of its divisors is an integer number (17934524300).

Almost surely, 2^213210312321 is an apocalyptic number.

It is an amenable number.

213210312321 is a deficient number, since it is larger than the sum of its proper divisors (73742076479).

213210312321 is a wasteful number, since it uses less digits than its factorization.

213210312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119408.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213210312321 its reverse (123213012312), we get a palindrome (336423324633).

The spelling of 213210312321 in words is "two hundred thirteen billion, two hundred ten million, three hundred twelve thousand, three hundred twenty-one".