21214203221320 has 16 divisors (see below), whose sum is σ = 47731957248060. Its totient is φ = 8485681288512.

The previous prime is 21214203221287. The next prime is 21214203221327. The reversal of 21214203221320 is 2312230241212.

It can be written as a sum of positive squares in 2 ways, for example, as 20732231266756 + 481971954564 = 4553266^2 + 694242^2 .

It is not an unprimeable number, because it can be changed into a prime (21214203221327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265177540227 + ... + 265177540306.

Almost surely, 2^{21214203221320} is an apocalyptic number.

21214203221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214203221320 is an abundant number, since it is smaller than the sum of its proper divisors (26517754026740).

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

21214203221320 is a wasteful number, since it uses less digits than its factorization.

21214203221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530355080544 (or 530355080540 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21214203221320 its reverse (2312230241212), we get a palindrome (23526433462532).

The spelling of 21214203221320 in words is "twenty-one trillion, two hundred fourteen billion, two hundred three million, two hundred twenty-one thousand, three hundred twenty".