21000212021012 has 24 divisors (see below), whose sum is σ = 42006598232256. Its totient is φ = 8998767825408.

The previous prime is 21000212021003. The next prime is 21000212021039. The reversal of 21000212021012 is 21012021200012.

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

It is a congruent number.

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, 54932813 + ... + 55313780.

It is an arithmetic number, because the mean of its divisors is an integer number (1750274926344).

Almost surely, 2^{21000212021012} is an apocalyptic number.

It is an amenable number.

21000212021012 is an abundant number, since it is smaller than the sum of its proper divisors (21006386211244).

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

21000212021012 is a wasteful number, since it uses less digits than its factorization.

21000212021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110253407 (or 110253405 counting only the distinct ones).

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

Adding to 21000212021012 its reverse (21012021200012), we get a palindrome (42012233221024).

The spelling of 21000212021012 in words is "twenty-one trillion, two hundred twelve million, twenty-one thousand, twelve".