21220050210000 has 200 divisors, whose sum is σ = 69958627373184. Its totient is φ = 5538282240000.

The previous prime is 21220050209989. The next prime is 21220050210001. The reversal of 21220050210000 is 1205002212.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220050210001) 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, 6114841 + ... + 8934840.

Almost surely, 2^{21220050210000} is an apocalyptic number.

21220050210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220050210000 is an abundant number, since it is smaller than the sum of its proper divisors (48738577163184).

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

21220050210000 is a wasteful number, since it uses less digits than its factorization.

21220050210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15049759 (or 15049738 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 21220050210000 its reverse (1205002212), we get a palindrome (21221255212212).

The spelling of 21220050210000 in words is "twenty-one trillion, two hundred twenty billion, fifty million, two hundred ten thousand".