21104042201 has 8 divisors (see below), whose sum is σ = 23346854208. Its totient is φ = 18915274000.

The previous prime is 21104042191. The next prime is 21104042209. The reversal of 21104042201 is 10224040112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21104042201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21104042201.

It is not an unprimeable number, because it can be changed into a prime (21104042209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13510130 + ... + 13511691.

It is an arithmetic number, because the mean of its divisors is an integer number (2918356776).

Almost surely, 2^21104042201 is an apocalyptic number.

It is an amenable number.

21104042201 is a deficient number, since it is larger than the sum of its proper divisors (2242812007).

21104042201 is a wasteful number, since it uses less digits than its factorization.

21104042201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27021903.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21104042201 its reverse (10224040112), we get a palindrome (31328082313).

The spelling of 21104042201 in words is "twenty-one billion, one hundred four million, forty-two thousand, two hundred one".