21222122311200 has 144 divisors (see below), whose sum is σ = 69382318309920. Its totient is φ = 5634301931520.

The previous prime is 21222122311189. The next prime is 21222122311231. The reversal of 21222122311200 is 211322122212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18932185 + ... + 20021784.

It is an arithmetic number, because the mean of its divisors is an integer number (481821654930).

Almost surely, 2^{21222122311200} is an apocalyptic number.

21222122311200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222122311200 is an abundant number, since it is smaller than the sum of its proper divisors (48160195998720).

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

21222122311200 is a wasteful number, since it uses less digits than its factorization.

21222122311200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38954219 (or 38954206 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21222122311200 its reverse (211322122212), we get a palindrome (21433444433412).

The spelling of 21222122311200 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two million, three hundred eleven thousand, two hundred".