21210022120000 has 420 divisors, whose sum is σ = 63851340830464. Its totient is φ = 6844216320000.

The previous prime is 21210022119947. The next prime is 21210022120033. The reversal of 21210022120000 is 2122001212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 80788945 + ... + 81051055.

Almost surely, 2^{21210022120000} is an apocalyptic number.

21210022120000 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 21210022120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31925670415232).

21210022120000 is an abundant number, since it is smaller than the sum of its proper divisors (42641318710464).

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

21210022120000 is an equidigital number, since it uses as much as digits as its factorization.

21210022120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262184 (or 262142 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21210022120000 its reverse (2122001212), we get a palindrome (21212144121212).

The spelling of 21210022120000 in words is "twenty-one trillion, two hundred ten billion, twenty-two million, one hundred twenty thousand".