321201020 has 48 divisors (see below), whose sum is σ = 771976128. Its totient is φ = 109969920.

The previous prime is 321201019. The next prime is 321201059. The reversal of 321201020 is 20102123.

It is a happy number.

321201020 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

321201020 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 321200992 and 321201010.

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, 143510 + ... + 145730.

It is an arithmetic number, because the mean of its divisors is an integer number (16082836).

Almost surely, 2^321201020 is an apocalyptic number.

It is an amenable number.

321201020 is an abundant number, since it is smaller than the sum of its proper divisors (450775108).

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

321201020 is a wasteful number, since it uses less digits than its factorization.

321201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270 (or 3268 counting only the distinct ones).

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

The square root of 321201020 is about 17922.0819103139. The cubic root of 321201020 is about 684.8450250578.

Adding to 321201020 its reverse (20102123), we get a palindrome (341303143).

The spelling of 321201020 in words is "three hundred twenty-one million, two hundred one thousand, twenty".