321440213213 has 16 divisors (see below), whose sum is σ = 373738700160. Its totient is φ = 270740141376.

The previous prime is 321440213131. The next prime is 321440213233. The reversal of 321440213213 is 312312044123.

It is a cyclic number.

It is not a de Polignac number, because 321440213213 - 2¹⁰ = 321440212189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321440213233) 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, 865895 + ... + 1180107.

It is an arithmetic number, because the mean of its divisors is an integer number (23358668760).

Almost surely, 2^321440213213 is an apocalyptic number.

It is an amenable number.

321440213213 is a deficient number, since it is larger than the sum of its proper divisors (52298486947).

321440213213 is a wasteful number, since it uses less digits than its factorization.

321440213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316756.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 321440213213 its reverse (312312044123), we get a palindrome (633752257336).

The spelling of 321440213213 in words is "three hundred twenty-one billion, four hundred forty million, two hundred thirteen thousand, two hundred thirteen".