21443030312104 has 16 divisors (see below), whose sum is σ = 40219647033600. Its totient is φ = 10717791103152.

The previous prime is 21443030312057. The next prime is 21443030312107. The reversal of 21443030312104 is 40121303034412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21443030312107) 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, 465482142 + ... + 465528205.

It is an arithmetic number, because the mean of its divisors is an integer number (2513727939600).

Almost surely, 2^{21443030312104} is an apocalyptic number.

It is an amenable number.

21443030312104 is a deficient number, since it is larger than the sum of its proper divisors (18776616721496).

21443030312104 is a wasteful number, since it uses less digits than its factorization.

21443030312104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931013232 (or 931013228 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21443030312104 its reverse (40121303034412), we get a palindrome (61564333346516).

The spelling of 21443030312104 in words is "twenty-one trillion, four hundred forty-three billion, thirty million, three hundred twelve thousand, one hundred four".