321120000020 has 24 divisors (see below), whose sum is σ = 675725446368. Its totient is φ = 128186391200.

The previous prime is 321120000001. The next prime is 321120000037. The reversal of 321120000020 is 20000021123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321119999956 and 321120000010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16340486 + ... + 16360125.

It is an arithmetic number, because the mean of its divisors is an integer number (28155226932).

Almost surely, 2^321120000020 is an apocalyptic number.

It is an amenable number.

321120000020 is an abundant number, since it is smaller than the sum of its proper divisors (354605446348).

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

321120000020 is a wasteful number, since it uses less digits than its factorization.

321120000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32701111 (or 32701109 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 321120000020 its reverse (20000021123), we get a palindrome (341120021143).

The spelling of 321120000020 in words is "three hundred twenty-one billion, one hundred twenty million, twenty", and thus it is an aban number.