21222110212000 has 96 divisors (see below), whose sum is σ = 54409800017664. Its totient is φ = 8119763872000.

The previous prime is 21222110211949. The next prime is 21222110212001. The reversal of 21222110212000 is 21201122212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21222110212001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115245556 + ... + 115429555.

It is an arithmetic number, because the mean of its divisors is an integer number (566768750184).

Almost surely, 2^{21222110212000} is an apocalyptic number.

21222110212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222110212000 is an abundant number, since it is smaller than the sum of its proper divisors (33187689805664).

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

21222110212000 is a wasteful number, since it uses less digits than its factorization.

21222110212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230675159 (or 230675141 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222110212000 its reverse (21201122212), we get a palindrome (21243311334212).

The spelling of 21222110212000 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred twelve thousand".