321213404323420 has 48 divisors (see below), whose sum is σ = 770921486028288. Its totient is φ = 110128979246400.

The previous prime is 321213404323417. The next prime is 321213404323453. The reversal of 321213404323420 is 24323404312123.

It is a super-2 number, since 2×321213404323420² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2200656 + ... + 25441495.

It is an arithmetic number, because the mean of its divisors is an integer number (16060864292256).

Almost surely, 2^{321213404323420} is an apocalyptic number.

It is an amenable number.

321213404323420 is an abundant number, since it is smaller than the sum of its proper divisors (449708081704868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321213404323420 is a wasteful number, since it uses less digits than its factorization.

321213404323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27725170 (or 27725168 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 321213404323420 its reverse (24323404312123), we get a palindrome (345536808635543).

The spelling of 321213404323420 in words is "three hundred twenty-one trillion, two hundred thirteen billion, four hundred four million, three hundred twenty-three thousand, four hundred twenty".