21010221010120 has 32 divisors (see below), whose sum is σ = 47440039691520. Its totient is φ = 8374391974080.

The previous prime is 21010221010057. The next prime is 21010221010153. The reversal of 21010221010120 is 2101012201012.

21010221010120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 21010221010120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928001976 + ... + 928024615.

It is an arithmetic number, because the mean of its divisors is an integer number (1482501240360).

Almost surely, 2^{21010221010120} is an apocalyptic number.

21010221010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010221010120 is an abundant number, since it is smaller than the sum of its proper divisors (26429818681400).

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

21010221010120 is a wasteful number, since it uses less digits than its factorization.

21010221010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856026885 (or 1856026881 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010221010120 its reverse (2101012201012), we get a palindrome (23111233211132).

The spelling of 21010221010120 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, ten thousand, one hundred twenty".