21303022212012 has 96 divisors (see below), whose sum is σ = 53751099225600. Its totient is φ = 6546524841472.

The previous prime is 21303022211963. The next prime is 21303022212047. The reversal of 21303022212012 is 21021222030312.

It is a self number, because there is not a number n which added to its sum of digits gives 21303022212012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2215483 + ... + 6893069.

It is an arithmetic number, because the mean of its divisors is an integer number (559907283600).

Almost surely, 2^{21303022212012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21303022212012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26875549612800).

21303022212012 is an abundant number, since it is smaller than the sum of its proper divisors (32448077013588).

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

21303022212012 is a wasteful number, since it uses less digits than its factorization.

21303022212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678215 (or 4678213 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21303022212012 its reverse (21021222030312), we get a palindrome (42324244242324).

The spelling of 21303022212012 in words is "twenty-one trillion, three hundred three billion, twenty-two million, two hundred twelve thousand, twelve".