21012010202120 has 64 divisors (see below), whose sum is σ = 54088547748480. Its totient is φ = 7196429200896.

The previous prime is 21012010202063. The next prime is 21012010202167. The reversal of 21012010202120 is 2120201021012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21012010202095 and 21012010202104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39781874 + ... + 40306593.

It is an arithmetic number, because the mean of its divisors is an integer number (845133558570).

Almost surely, 2^{21012010202120} is an apocalyptic number.

21012010202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012010202120 is an abundant number, since it is smaller than the sum of its proper divisors (33076537546360).

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

21012010202120 is a wasteful number, since it uses less digits than its factorization.

21012010202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80089422 (or 80089418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012010202120 its reverse (2120201021012), we get a palindrome (23132211223132).

The spelling of 21012010202120 in words is "twenty-one trillion, twelve billion, ten million, two hundred two thousand, one hundred twenty".