21333301333220 has 48 divisors (see below), whose sum is σ = 45384639415920. Its totient is φ = 8422292127744.

The previous prime is 21333301333151. The next prime is 21333301333237. The reversal of 21333301333220 is 2233310333312.

It can be written as a sum of positive squares in 8 ways, for example, as 10573891069504 + 10759410263716 = 3251752^2 + 3280154^2 .

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, 9767069 + ... + 11749988.

It is an arithmetic number, because the mean of its divisors is an integer number (945513321165).

Almost surely, 2^{21333301333220} is an apocalyptic number.

21333301333220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21333301333220 is an abundant number, since it is smaller than the sum of its proper divisors (24051338082700).

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

21333301333220 is a wasteful number, since it uses less digits than its factorization.

21333301333220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21517712 (or 21517710 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 29.

Adding to 21333301333220 its reverse (2233310333312), we get a palindrome (23566611666532).

The spelling of 21333301333220 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred one million, three hundred thirty-three thousand, two hundred twenty".