21210011002012 has 36 divisors (see below), whose sum is σ = 43358181582240. Its totient is φ = 9051971202624.

The previous prime is 21210011002009. The next prime is 21210011002027. The reversal of 21210011002012 is 21020011001212.

It is a junction number, because it is equal to n+sod(n) for n = 21210011001983 and 21210011002001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226342993 + ... + 226436680.

It is an arithmetic number, because the mean of its divisors is an integer number (1204393932840).

Almost surely, 2^{21210011002012} is an apocalyptic number.

It is an amenable number.

21210011002012 is an abundant number, since it is smaller than the sum of its proper divisors (22148170580228).

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

21210011002012 is a wasteful number, since it uses less digits than its factorization.

21210011002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452779930 (or 452779921 counting only the distinct ones).

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

Adding to 21210011002012 its reverse (21020011001212), we get a palindrome (42230022003224).

The spelling of 21210011002012 in words is "twenty-one trillion, two hundred ten billion, eleven million, two thousand, twelve".