21222302220012 has 192 divisors, whose sum is σ = 53643127910400. Its totient is φ = 6515346539520.

The previous prime is 21222302220011. The next prime is 21222302220043. The reversal of 21222302220012 is 21002220322212.

It is a super-2 number, since 2×21222302220012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222302220011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 982003087 + ... + 982024697.

It is an arithmetic number, because the mean of its divisors is an integer number (279391291200).

Almost surely, 2^{21222302220012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222302220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26821563955200).

21222302220012 is an abundant number, since it is smaller than the sum of its proper divisors (32420825690388).

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

21222302220012 is a wasteful number, since it uses less digits than its factorization.

21222302220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176 (or 23174 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21222302220012 its reverse (21002220322212), we get a palindrome (42224522542224).

The spelling of 21222302220012 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred two million, two hundred twenty thousand, twelve".