21323030220000 has 240 divisors, whose sum is σ = 77715339443280. Its totient is φ = 5686141248000.

The previous prime is 21323030219993. The next prime is 21323030220001. The reversal of 21323030220000 is 2203032312.

It is a happy number.

21323030220000 is a `hidden beast` number, since 2 + 132 + 30 + 302 + 200 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323030220001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19203547 + ... + 20283546.

It is an arithmetic number, because the mean of its divisors is an integer number (323813914347).

Almost surely, 2^{21323030220000} is an apocalyptic number.

21323030220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323030220000 is an abundant number, since it is smaller than the sum of its proper divisors (56392309223280).

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

21323030220000 is an equidigital number, since it uses as much as digits as its factorization.

21323030220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39487132 (or 39487103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21323030220000 its reverse (2203032312), we get a palindrome (21325233252312).

The spelling of 21323030220000 in words is "twenty-one trillion, three hundred twenty-three billion, thirty million, two hundred twenty thousand".