321440213212 has 96 divisors (see below), whose sum is σ = 632419522560. Its totient is φ = 142153989120.

The previous prime is 321440213131. The next prime is 321440213233. The reversal of 321440213212 is 212312044123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126599839 + ... + 126602377.

It is an arithmetic number, because the mean of its divisors is an integer number (6587703360).

Almost surely, 2^321440213212 is an apocalyptic number.

It is an amenable number.

321440213212 is a deficient number, since it is larger than the sum of its proper divisors (310979309348).

321440213212 is a wasteful number, since it uses less digits than its factorization.

321440213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 321440213212 its reverse (212312044123), we get a palindrome (533752257335).

The spelling of 321440213212 in words is "three hundred twenty-one billion, four hundred forty million, two hundred thirteen thousand, two hundred twelve".