321221012032 has 28 divisors (see below), whose sum is σ = 637509146620. Its totient is φ = 160588786176.

The previous prime is 321221011997. The next prime is 321221012041. The reversal of 321221012032 is 230210122123.

It can be written as a sum of positive squares in 2 ways, for example, as 230031507456 + 91189504576 = 479616^2 + 301976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142894 + ... + 814162.

Almost surely, 2^321221012032 is an apocalyptic number.

321221012032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321221012032 is a deficient number, since it is larger than the sum of its proper divisors (316288134588).

321221012032 is an equidigital number, since it uses as much as digits as its factorization.

321221012032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678758 (or 678748 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 321221012032 its reverse (230210122123), we get a palindrome (551431134155).

The spelling of 321221012032 in words is "three hundred twenty-one billion, two hundred twenty-one million, twelve thousand, thirty-two".