21233131231120 has 80 divisors (see below), whose sum is σ = 49696751168640. Its totient is φ = 8436532608000.

The previous prime is 21233131231097. The next prime is 21233131231121. The reversal of 21233131231120 is 2113213133212.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (21233131231121) 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, 282284076 + ... + 282359284.

It is an arithmetic number, because the mean of its divisors is an integer number (621209389608).

Almost surely, 2^{21233131231120} is an apocalyptic number.

21233131231120 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 21233131231120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24848375584320).

21233131231120 is an abundant number, since it is smaller than the sum of its proper divisors (28463619937520).

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

21233131231120 is a wasteful number, since it uses less digits than its factorization.

21233131231120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98744 (or 98738 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21233131231120 its reverse (2113213133212), we get a palindrome (23346344364332).

The spelling of 21233131231120 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty".