21204131201 has 8 divisors (see below), whose sum is σ = 23313921024. Its totient is φ = 19124698320.

The previous prime is 21204131197. The next prime is 21204131213. The reversal of 21204131201 is 10213140212.

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 21204131201 - 2² = 21204131197 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 21204131201.

It is not an unprimeable number, because it can be changed into a prime (21204131101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7587770 + ... + 7590563.

It is an arithmetic number, because the mean of its divisors is an integer number (2914240128).

Almost surely, 2^21204131201 is an apocalyptic number.

It is an amenable number.

21204131201 is a deficient number, since it is larger than the sum of its proper divisors (2109789823).

21204131201 is a wasteful number, since it uses less digits than its factorization.

21204131201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15178471.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21204131201 its reverse (10213140212), we get a palindrome (31417271413).

The spelling of 21204131201 in words is "twenty-one billion, two hundred four million, one hundred thirty-one thousand, two hundred one".