21222323300144 has 160 divisors (see below), whose sum is σ = 44350222118400. Its totient is φ = 9801597358080.

The previous prime is 21222323300137. The next prime is 21222323300203. The reversal of 21222323300144 is 44100332322212.

It is a super-2 number, since 2×21222323300144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7528314767 + ... + 7528317585.

It is an arithmetic number, because the mean of its divisors is an integer number (277188888240).

Almost surely, 2^{21222323300144} 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 21222323300144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22175111059200).

21222323300144 is an abundant number, since it is smaller than the sum of its proper divisors (23127898818256).

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

21222323300144 is a wasteful number, since it uses less digits than its factorization.

21222323300144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21222323300144 its reverse (44100332322212), we get a palindrome (65322655622356).

The spelling of 21222323300144 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twenty-three million, three hundred thousand, one hundred forty-four".