21003232321220 has 48 divisors (see below), whose sum is σ = 44730933464448. Its totient is φ = 8283066700800.

The previous prime is 21003232321193. The next prime is 21003232321231. The reversal of 21003232321220 is 2212323230012.

It is a super-2 number, since 2×21003232321220² (a number of 27 digits) contains 22 as substring.

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, 20072306 + ... + 21092745.

It is an arithmetic number, because the mean of its divisors is an integer number (931894447176).

Almost surely, 2^{21003232321220} is an apocalyptic number.

21003232321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003232321220 is an abundant number, since it is smaller than the sum of its proper divisors (23727701143228).

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

21003232321220 is a wasteful number, since it uses less digits than its factorization.

21003232321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41165420 (or 41165418 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21003232321220 its reverse (2212323230012), we get a palindrome (23215555551232).

The spelling of 21003232321220 in words is "twenty-one trillion, three billion, two hundred thirty-two million, three hundred twenty-one thousand, two hundred twenty".