21342222243120 has 320 divisors, whose sum is σ = 69824643508224. Its totient is φ = 5386749849600.

The previous prime is 21342222243109. The next prime is 21342222243193. The reversal of 21342222243120 is 2134222224312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48771214 + ... + 49206866.

Almost surely, 2^{21342222243120} is an apocalyptic number.

21342222243120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21342222243120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34912321754112).

21342222243120 is an abundant number, since it is smaller than the sum of its proper divisors (48482421265104).

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

21342222243120 is a wasteful number, since it uses less digits than its factorization.

21342222243120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435860 (or 435854 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21342222243120 its reverse (2134222224312), we get a palindrome (23476444467432).

The spelling of 21342222243120 in words is "twenty-one trillion, three hundred forty-two billion, two hundred twenty-two million, two hundred forty-three thousand, one hundred twenty".