321404434120 has 128 divisors (see below), whose sum is σ = 910529683200. Its totient is φ = 99186048000.

The previous prime is 321404434103. The next prime is 321404434147. The reversal of 321404434120 is 21434404123.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205515 + ... + 827674.

It is an arithmetic number, because the mean of its divisors is an integer number (7113513150).

Almost surely, 2^321404434120 is an apocalyptic number.

It is an amenable number.

321404434120 is an abundant number, since it is smaller than the sum of its proper divisors (589125249080).

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

321404434120 is a wasteful number, since it uses less digits than its factorization.

321404434120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033319 (or 1033315 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 321404434120 its reverse (21434404123), we get a palindrome (342838838243).

The spelling of 321404434120 in words is "three hundred twenty-one billion, four hundred four million, four hundred thirty-four thousand, one hundred twenty".