21011300232312 has 128 divisors (see below), whose sum is σ = 57563378832960. Its totient is φ = 6351606558720.

The previous prime is 21011300232301. The next prime is 21011300232313. The reversal of 21011300232312 is 21323200311012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011300232313) 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 31 ways as a sum of consecutive naturals, for example, 15666318 + ... + 16954530.

Almost surely, 2^{21011300232312} 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 21011300232312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28781689416480).

21011300232312 is an abundant number, since it is smaller than the sum of its proper divisors (36552078600648).

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

21011300232312 is a wasteful number, since it uses less digits than its factorization.

21011300232312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289153 (or 1289149 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21011300232312 its reverse (21323200311012), we get a palindrome (42334500543324).

The spelling of 21011300232312 in words is "twenty-one trillion, eleven billion, three hundred million, two hundred thirty-two thousand, three hundred twelve".