21011202220000 has 240 divisors, whose sum is σ = 52257128616000. Its totient is φ = 8312864000000.

The previous prime is 21011202219979. The next prime is 21011202220009. The reversal of 21011202220000 is 2220211012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011202220009) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 712205250 + ... + 712234750.

It is an arithmetic number, because the mean of its divisors is an integer number (217738035900).

Almost surely, 2^{21011202220000} is an apocalyptic number.

21011202220000 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 21011202220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26128564308000).

21011202220000 is an abundant number, since it is smaller than the sum of its proper divisors (31245926396000).

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

21011202220000 is a wasteful number, since it uses less digits than its factorization.

21011202220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29919 (or 29896 counting only the distinct ones).

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

Adding to 21011202220000 its reverse (2220211012), we get a palindrome (21013422431012).

The spelling of 21011202220000 in words is "twenty-one trillion, eleven billion, two hundred two million, two hundred twenty thousand".