21105113023312 has 40 divisors (see below), whose sum is σ = 40908647355336. Its totient is φ = 10548043654656.

The previous prime is 21105113023297. The next prime is 21105113023331. The reversal of 21105113023312 is 21332031150112.

It can be written as a sum of positive squares in 4 ways, for example, as 9801557993536 + 11303555029776 = 3130744^2 + 3362076^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463489698 + ... + 463535230.

Almost surely, 2^{21105113023312} is an apocalyptic number.

It is an amenable number.

21105113023312 is a deficient number, since it is larger than the sum of its proper divisors (19803534332024).

21105113023312 is a wasteful number, since it uses less digits than its factorization.

21105113023312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57295 (or 57289 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 21105113023312 its reverse (21332031150112), we get a palindrome (42437144173424).

The spelling of 21105113023312 in words is "twenty-one trillion, one hundred five billion, one hundred thirteen million, twenty-three thousand, three hundred twelve".