21321113203112 has 16 divisors (see below), whose sum is σ = 40350704895360. Its totient is φ = 10560925231024.

The previous prime is 21321113203109. The next prime is 21321113203123. The reversal of 21321113203112 is 21130231112312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12453920408 + ... + 12453922119.

It is an arithmetic number, because the mean of its divisors is an integer number (2521919055960).

Almost surely, 2^{21321113203112} is an apocalyptic number.

It is an amenable number.

21321113203112 is a deficient number, since it is larger than the sum of its proper divisors (19029591692248).

21321113203112 is a wasteful number, since it uses less digits than its factorization.

21321113203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24907842640 (or 24907842636 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21321113203112 its reverse (21130231112312), we get a palindrome (42451344315424).

The spelling of 21321113203112 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirteen million, two hundred three thousand, one hundred twelve".