321020223132 has 48 divisors (see below), whose sum is σ = 856771759872. Its totient is φ = 91643153280.

The previous prime is 321020223131. The next prime is 321020223187. The reversal of 321020223132 is 231322020123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 321020223099 and 321020223108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321020223131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1501494 + ... + 1701917.

It is an arithmetic number, because the mean of its divisors is an integer number (17849411664).

Almost surely, 2^321020223132 is an apocalyptic number.

It is an amenable number.

321020223132 is an abundant number, since it is smaller than the sum of its proper divisors (535751536740).

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

321020223132 is a wasteful number, since it uses less digits than its factorization.

321020223132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204618 (or 3204616 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 321020223132 its reverse (231322020123), we get a palindrome (552342243255).

The spelling of 321020223132 in words is "three hundred twenty-one billion, twenty million, two hundred twenty-three thousand, one hundred thirty-two".