21130104245443 has 4 divisors (see below), whose sum is σ = 21131826492960. Its totient is φ = 21128381997928.

The previous prime is 21130104245413. The next prime is 21130104245513. The reversal of 21130104245443 is 34454240103112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21130104245443 - 2³⁷ = 20992665291971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130104245399 and 21130104245408.

It is not an unprimeable number, because it can be changed into a prime (21130104245413) 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, 861105355 + ... + 861129892.

It is an arithmetic number, because the mean of its divisors is an integer number (5282956623240).

Almost surely, 2^{21130104245443} is an apocalyptic number.

21130104245443 is a deficient number, since it is larger than the sum of its proper divisors (1722247517).

21130104245443 is a wasteful number, since it uses less digits than its factorization.

21130104245443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722247516.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21130104245443 its reverse (34454240103112), we get a palindrome (55584344348555).

The spelling of 21130104245443 in words is "twenty-one trillion, one hundred thirty billion, one hundred four million, two hundred forty-five thousand, four hundred forty-three".