21124440511320 has 32 divisors (see below), whose sum is σ = 63373321534320. Its totient is φ = 5633184136320.

The previous prime is 21124440511301. The next prime is 21124440511351. The reversal of 21124440511320 is 2311504442112.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88018502011 + ... + 88018502250.

Almost surely, 2^{21124440511320} is an apocalyptic number.

21124440511320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21124440511320 is an abundant number, since it is smaller than the sum of its proper divisors (42248881023000).

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

21124440511320 is a wasteful number, since it uses less digits than its factorization.

21124440511320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176037004275 (or 176037004271 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 21124440511320 its reverse (2311504442112), we get a palindrome (23435944953432).

The spelling of 21124440511320 in words is "twenty-one trillion, one hundred twenty-four billion, four hundred forty million, five hundred eleven thousand, three hundred twenty".