21332100120 has 64 divisors (see below), whose sum is σ = 64463476320. Its totient is φ = 5647033344.

The previous prime is 21332100113. The next prime is 21332100151. The reversal of 21332100120 is 2100123312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21332100120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632347 + ... + 665226.

Almost surely, 2^21332100120 is an apocalyptic number.

21332100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332100120 is an abundant number, since it is smaller than the sum of its proper divisors (43131376200).

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

21332100120 is a wasteful number, since it uses less digits than its factorization.

21332100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297724 (or 1297720 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21332100120 its reverse (2100123312), we get a palindrome (23432223432).

The spelling of 21332100120 in words is "twenty-one billion, three hundred thirty-two million, one hundred thousand, one hundred twenty".