321140230220 has 48 divisors (see below), whose sum is σ = 716171228640. Its totient is φ = 120618279936.

The previous prime is 321140230219. The next prime is 321140230223. The reversal of 321140230220 is 22032041123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 321140230192 and 321140230201.

It is not an unprimeable number, because it can be changed into a prime (321140230223) 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, 3696467 + ... + 3782346.

It is an arithmetic number, because the mean of its divisors is an integer number (14920233930).

Almost surely, 2^321140230220 is an apocalyptic number.

It is an amenable number.

321140230220 is an abundant number, since it is smaller than the sum of its proper divisors (395030998420).

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

321140230220 is a wasteful number, since it uses less digits than its factorization.

321140230220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478954 (or 7478952 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 321140230220 its reverse (22032041123), we get a palindrome (343172271343).

The spelling of 321140230220 in words is "three hundred twenty-one billion, one hundred forty million, two hundred thirty thousand, two hundred twenty".