21333220201220 has 48 divisors (see below), whose sum is σ = 45469228344960. Its totient is φ = 8405775316224.

The previous prime is 21333220201213. The next prime is 21333220201243. The reversal of 21333220201220 is 2210202233312.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 102431432 + ... + 102639488.

It is an arithmetic number, because the mean of its divisors is an integer number (947275590520).

Almost surely, 2^{21333220201220} is an apocalyptic number.

21333220201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21333220201220 is an abundant number, since it is smaller than the sum of its proper divisors (24136008143740).

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

21333220201220 is a wasteful number, since it uses less digits than its factorization.

21333220201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284652 (or 284650 counting only the distinct ones).

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

Adding to 21333220201220 its reverse (2210202233312), we get a palindrome (23543422434532).

The spelling of 21333220201220 in words is "twenty-one trillion, three hundred thirty-three billion, two hundred twenty million, two hundred one thousand, two hundred twenty".