21323230323312 has 40 divisors (see below), whose sum is σ = 55085685611904. Its totient is φ = 7107656480704.

The previous prime is 21323230323289. The next prime is 21323230323313. The reversal of 21323230323312 is 21332303232312.

It is a self number, because there is not a number n which added to its sum of digits gives 21323230323312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323230323313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308133 + ... + 6660155.

Almost surely, 2^{21323230323312} is an apocalyptic number.

It is an amenable number.

21323230323312 is an abundant number, since it is smaller than the sum of its proper divisors (33762455288592).

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

21323230323312 is a wasteful number, since it uses less digits than its factorization.

21323230323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435037 (or 5435031 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 30.

Adding to 21323230323312 its reverse (21332303232312), we get a palindrome (42655533555624).

The spelling of 21323230323312 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred thirty million, three hundred twenty-three thousand, three hundred twelve".