321440422121240 has 64 divisors (see below), whose sum is σ = 747678046500000. Its totient is φ = 124289337461760.

The previous prime is 321440422121233. The next prime is 321440422121257. The reversal of 321440422121240 is 42121224044123.

It is a junction number, because it is equal to n+sod(n) for n = 321440422121197 and 321440422121206.

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, 898904990 + ... + 899262509.

Almost surely, 2^{321440422121240} is an apocalyptic number.

It is an amenable number.

321440422121240 is an abundant number, since it is smaller than the sum of its proper divisors (426237624378760).

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

321440422121240 is a wasteful number, since it uses less digits than its factorization.

321440422121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798167660 (or 1798167656 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 321440422121240 its reverse (42121224044123), we get a palindrome (363561646165363).

The spelling of 321440422121240 in words is "three hundred twenty-one trillion, four hundred forty billion, four hundred twenty-two million, one hundred twenty-one thousand, two hundred forty".