21321222211300 has 36 divisors (see below), whose sum is σ = 50473147855536. Its totient is φ = 7753171712800.

The previous prime is 21321222211217. The next prime is 21321222211327. The reversal of 21321222211300 is 311222212312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9691463542 + ... + 9691465741.

It is an arithmetic number, because the mean of its divisors is an integer number (1402031884876).

Almost surely, 2^{21321222211300} is an apocalyptic number.

21321222211300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321222211300 is an abundant number, since it is smaller than the sum of its proper divisors (29151925644236).

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

21321222211300 is a wasteful number, since it uses less digits than its factorization.

21321222211300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19382929308 (or 19382929301 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21321222211300 its reverse (311222212312), we get a palindrome (21632444423612).

The spelling of 21321222211300 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, three hundred".