21000104044312 has 16 divisors (see below), whose sum is σ = 40439389545360. Its totient is φ = 10216266832224.

The previous prime is 21000104044291. The next prime is 21000104044319. The reversal of 21000104044312 is 21344040100012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000104044319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35473148428 + ... + 35473149019.

It is an arithmetic number, because the mean of its divisors is an integer number (2527461846585).

Almost surely, 2^{21000104044312} is an apocalyptic number.

It is an amenable number.

21000104044312 is a deficient number, since it is larger than the sum of its proper divisors (19439285501048).

21000104044312 is a wasteful number, since it uses less digits than its factorization.

21000104044312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70946297490 (or 70946297486 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21000104044312 its reverse (21344040100012), we get a palindrome (42344144144324).

The spelling of 21000104044312 in words is "twenty-one trillion, one hundred four million, forty-four thousand, three hundred twelve".