321420310431020 has 96 divisors (see below), whose sum is σ = 699177470181120. Its totient is φ = 123971290248960.

The previous prime is 321420310430993. The next prime is 321420310431091. The reversal of 321420310431020 is 20134013024123.

It is a super-2 number, since 2×321420310431020² (a number of 30 digits) contains 22 as substring.

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, 7979035799 + ... + 7979076081.

It is an arithmetic number, because the mean of its divisors is an integer number (7283098647720).

Almost surely, 2^{321420310431020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321420310431020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349588735090560).

321420310431020 is an abundant number, since it is smaller than the sum of its proper divisors (377757159750100).

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

321420310431020 is a wasteful number, since it uses less digits than its factorization.

321420310431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58095 (or 58093 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 321420310431020 its reverse (20134013024123), we get a palindrome (341554323455143).

The spelling of 321420310431020 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred ten million, four hundred thirty-one thousand, twenty".