21323113222120 has 128 divisors (see below), whose sum is σ = 50478467760000. Its totient is φ = 8094612800512.

The previous prime is 21323113222063. The next prime is 21323113222139. The reversal of 21323113222120 is 2122231132312.

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, 957943551 + ... + 957965809.

It is an arithmetic number, because the mean of its divisors is an integer number (394363029375).

Almost surely, 2^{21323113222120} is an apocalyptic number.

21323113222120 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 21323113222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25239233880000).

21323113222120 is an abundant number, since it is smaller than the sum of its proper divisors (29155354537880).

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

21323113222120 is a wasteful number, since it uses less digits than its factorization.

21323113222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36355 (or 36351 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21323113222120 its reverse (2122231132312), we get a palindrome (23445344354432).

The spelling of 21323113222120 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirteen million, two hundred twenty-two thousand, one hundred twenty".