21002143041 has 24 divisors (see below), whose sum is σ = 34235472960. Its totient is φ = 12289653600.

The previous prime is 21002142977. The next prime is 21002143067. The reversal of 21002143041 is 14034120012.

21002143041 is a `hidden beast` number, since 210 + 0 + 21 + 430 + 4 + 1 = 666.

It is not a de Polignac number, because 21002143041 - 2⁶ = 21002142977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002143541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3654765 + ... + 3660506.

It is an arithmetic number, because the mean of its divisors is an integer number (1426478040).

Almost surely, 2^21002143041 is an apocalyptic number.

It is an amenable number.

21002143041 is a deficient number, since it is larger than the sum of its proper divisors (13233329919).

21002143041 is a wasteful number, since it uses less digits than its factorization.

21002143041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315317 (or 7315314 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21002143041 its reverse (14034120012), we get a palindrome (35036263053).

The spelling of 21002143041 in words is "twenty-one billion, two million, one hundred forty-three thousand, forty-one".