21010210221120 has 224 divisors, whose sum is σ = 66943937963520. Its totient is φ = 5582889492480.

The previous prime is 21010210221073. The next prime is 21010210221151. The reversal of 21010210221120 is 2112201201012.

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 21010210221120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342976414 + ... + 343037666.

Almost surely, 2^{21010210221120} is an apocalyptic number.

21010210221120 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 21010210221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33471968981760).

21010210221120 is an abundant number, since it is smaller than the sum of its proper divisors (45933727742400).

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

21010210221120 is a wasteful number, since it uses less digits than its factorization.

21010210221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62533 (or 62523 counting only the distinct ones).

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

Adding to 21010210221120 its reverse (2112201201012), we get a palindrome (23122411422132).

The spelling of 21010210221120 in words is "twenty-one trillion, ten billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty".