21221021201120 has 192 divisors, whose sum is σ = 54219822902784. Its totient is φ = 7802310666240.

The previous prime is 21221021201101. The next prime is 21221021201147. The reversal of 21221021201120 is 2110212012212.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 896486885 + ... + 896510555.

It is an arithmetic number, because the mean of its divisors is an integer number (282394910952).

Almost surely, 2^{21221021201120} is an apocalyptic number.

21221021201120 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 21221021201120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27109911451392).

21221021201120 is an abundant number, since it is smaller than the sum of its proper divisors (32998801701664).

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

21221021201120 is a wasteful number, since it uses less digits than its factorization.

21221021201120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25505 (or 25497 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221021201120 its reverse (2110212012212), we get a palindrome (23331233213332).

The spelling of 21221021201120 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred one thousand, one hundred twenty".