16821010210120 has 16 divisors (see below), whose sum is σ = 37847272972860. Its totient is φ = 6728404084032.

The previous prime is 16821010210111. The next prime is 16821010210133. The reversal of 16821010210120 is 2101201012861.

16821010210120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16344377381124 + 476632828996 = 4042818^2 + 690386^2 .

It is a super-2 number, since 2×16821010210120² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210262627587 + ... + 210262627666.

Almost surely, 2^{16821010210120} is an apocalyptic number.

16821010210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16821010210120 is an abundant number, since it is smaller than the sum of its proper divisors (21026262762740).

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

16821010210120 is a wasteful number, since it uses less digits than its factorization.

16821010210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420525255264 (or 420525255260 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 16821010210120 its reverse (2101201012861), we get a palindrome (18922211222981).

The spelling of 16821010210120 in words is "sixteen trillion, eight hundred twenty-one billion, ten million, two hundred ten thousand, one hundred twenty".