21302133120 has 192 divisors, whose sum is σ = 74947906800. Its totient is φ = 5573308416.

The previous prime is 21302133091. The next prime is 21302133133. The reversal of 21302133120 is 2133120312.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21302133093 and 21302133102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270391 + ... + 340169.

Almost surely, 2^21302133120 is an apocalyptic number.

21302133120 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 21302133120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37473953400).

21302133120 is an abundant number, since it is smaller than the sum of its proper divisors (53645773680).

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

21302133120 is a wasteful number, since it uses less digits than its factorization.

21302133120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69857 (or 69842 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21302133120 its reverse (2133120312), we get a palindrome (23435253432).

The spelling of 21302133120 in words is "twenty-one billion, three hundred two million, one hundred thirty-three thousand, one hundred twenty".