21204124041 has 8 divisors (see below), whose sum is σ = 28291818240. Its totient is φ = 14126256272.

The previous prime is 21204124001. The next prime is 21204124057. The reversal of 21204124041 is 14042140212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21204124041 - 2⁹ = 21204123529 is a prime.

It is a super-2 number, since 2×21204124041² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21204123999 and 21204124017.

It is not an unprimeable number, because it can be changed into a prime (21204124001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2451570 + ... + 2460203.

It is an arithmetic number, because the mean of its divisors is an integer number (3536477280).

Almost surely, 2^21204124041 is an apocalyptic number.

It is an amenable number.

21204124041 is a deficient number, since it is larger than the sum of its proper divisors (7087694199).

21204124041 is a wasteful number, since it uses less digits than its factorization.

21204124041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913215.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21204124041 its reverse (14042140212), we get a palindrome (35246264253).

The spelling of 21204124041 in words is "twenty-one billion, two hundred four million, one hundred twenty-four thousand, forty-one".