21021213210112 has 80 divisors (see below), whose sum is σ = 46405605467232. Its totient is φ = 9462233989120.

The previous prime is 21021213210037. The next prime is 21021213210119. The reversal of 21021213210112 is 21101231212012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021213210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021213210119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52302439 + ... + 52702822.

Almost surely, 2^{21021213210112} is an apocalyptic number.

It is an amenable number.

21021213210112 is an abundant number, since it is smaller than the sum of its proper divisors (25384392257120).

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

21021213210112 is a wasteful number, since it uses less digits than its factorization.

21021213210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105005319 (or 105005303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21021213210112 its reverse (21101231212012), we get a palindrome (42122444422124).

The spelling of 21021213210112 in words is "twenty-one trillion, twenty-one billion, two hundred thirteen million, two hundred ten thousand, one hundred twelve".