21010221021120 has 224 divisors, whose sum is σ = 66834194845440. Its totient is φ = 5592091115520.

The previous prime is 21010221021113. The next prime is 21010221021121. The reversal of 21010221021120 is 2112012201012.

21010221021120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21010221021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010221021121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1134268179 + ... + 1134286701.

Almost surely, 2^{21010221021120} is an apocalyptic number.

21010221021120 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 21010221021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33417097422720).

21010221021120 is an abundant number, since it is smaller than the sum of its proper divisors (45823973824320).

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

21010221021120 is a wasteful number, since it uses less digits than its factorization.

21010221021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20723 (or 20713 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21010221021120 its reverse (2112012201012), we get a palindrome (23122233222132).

The spelling of 21010221021120 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty".