21320110512000 has 384 divisors, whose sum is σ = 77035660809120. Its totient is φ = 5650477056000.

The previous prime is 21320110511983. The next prime is 21320110512013. The reversal of 21320110512000 is 21501102312.

21320110512000 is a `hidden beast` number, since 21 + 3 + 20 + 110 + 512 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×21320110512000² (a number of 27 digits) contains 22 as substring.

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

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 47 ways as a sum of consecutive naturals, for example, 23017840 + ... + 23926160.

Almost surely, 2^{21320110512000} is an apocalyptic number.

21320110512000 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 21320110512000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38517830404560).

21320110512000 is an abundant number, since it is smaller than the sum of its proper divisors (55715550297120).

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

21320110512000 is a wasteful number, since it uses less digits than its factorization.

21320110512000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908519 (or 908494 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 21320110512000 its reverse (21501102312), we get a palindrome (21341611614312).

The spelling of 21320110512000 in words is "twenty-one trillion, three hundred twenty billion, one hundred ten million, five hundred twelve thousand".