321120021404 has 48 divisors (see below), whose sum is σ = 708512500416. Its totient is φ = 123938035200.

The previous prime is 321120021401. The next prime is 321120021427. The reversal of 321120021404 is 404120021123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120021401) 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, 10743587 + ... + 10773434.

It is an arithmetic number, because the mean of its divisors is an integer number (14760677092).

Almost surely, 2^321120021404 is an apocalyptic number.

It is an amenable number.

321120021404 is an abundant number, since it is smaller than the sum of its proper divisors (387392479012).

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

321120021404 is a wasteful number, since it uses less digits than its factorization.

321120021404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21517086 (or 21517084 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 321120021404 its reverse (404120021123), we get a palindrome (725240042527).

The spelling of 321120021404 in words is "three hundred twenty-one billion, one hundred twenty million, twenty-one thousand, four hundred four".