321020011312220 has 48 divisors (see below), whose sum is σ = 738667431831168. Its totient is φ = 116220300432960.

The previous prime is 321020011312219. The next prime is 321020011312241. The reversal of 321020011312220 is 22213110020123.

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 = 321020011312192 and 321020011312201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3214007042 + ... + 3214106921.

It is an arithmetic number, because the mean of its divisors is an integer number (15388904829816).

Almost surely, 2^{321020011312220} is an apocalyptic number.

It is an amenable number.

321020011312220 is an abundant number, since it is smaller than the sum of its proper divisors (417647420518948).

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

321020011312220 is a wasteful number, since it uses less digits than its factorization.

321020011312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6428114210 (or 6428114208 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 321020011312220 its reverse (22213110020123), we get a palindrome (343233121332343).

The spelling of 321020011312220 in words is "three hundred twenty-one trillion, twenty billion, eleven million, three hundred twelve thousand, two hundred twenty".