321220222002 has 24 divisors (see below), whose sum is σ = 696133685520. Its totient is φ = 107049324600.

The previous prime is 321220221989. The next prime is 321220222013. The reversal of 321220222002 is 200222022123.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1924552 + ... + 2084787.

It is an arithmetic number, because the mean of its divisors is an integer number (29005570230).

Almost surely, 2^321220222002 is an apocalyptic number.

321220222002 is an abundant number, since it is smaller than the sum of its proper divisors (374913463518).

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

321220222002 is a wasteful number, since it uses less digits than its factorization.

321220222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013798 (or 4013795 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 321220222002 its reverse (200222022123), we get a palindrome (521442244125).

The spelling of 321220222002 in words is "three hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two".