21000223200000 has 864 divisors, whose sum is σ = 78273802656000. Its totient is φ = 4953139200000.

The previous prime is 21000223199933. The next prime is 21000223200013. The reversal of 21000223200000 is 232200012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 976789251 + ... + 976810749.

It is an arithmetic number, because the mean of its divisors is an integer number (90594679000).

Almost surely, 2^{21000223200000} is an apocalyptic number.

21000223200000 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 21000223200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39136901328000).

21000223200000 is an abundant number, since it is smaller than the sum of its proper divisors (57273579456000).

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

21000223200000 is an equidigital number, since it uses as much as digits as its factorization.

21000223200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21591 (or 21557 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21000223200000 its reverse (232200012), we get a palindrome (21000455400012).

The spelling of 21000223200000 in words is "twenty-one trillion, two hundred twenty-three million, two hundred thousand".