21321220223322 has 64 divisors (see below), whose sum is σ = 49875196560000. Its totient is φ = 6732882290304.

The previous prime is 21321220223299. The next prime is 21321220223491. The reversal of 21321220223322 is 22332202212312.

21321220223322 is a `hidden beast` number, since 2 + 1 + 321 + 2 + 2 + 0 + 2 + 2 + 332 + 2 = 666.

It is a super-2 number, since 2×21321220223322² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59486304 + ... + 59843652.

It is an arithmetic number, because the mean of its divisors is an integer number (779299946250).

Almost surely, 2^{21321220223322} is an apocalyptic number.

21321220223322 is an abundant number, since it is smaller than the sum of its proper divisors (28553976336678).

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

21321220223322 is a wasteful number, since it uses less digits than its factorization.

21321220223322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415532 (or 415526 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21321220223322 its reverse (22332202212312), we get a palindrome (43653422435634).

The spelling of 21321220223322 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty million, two hundred twenty-three thousand, three hundred twenty-two".