21201310660201 has 8 divisors (see below), whose sum is σ = 24230099615360. Its totient is φ = 18172529277408.

The previous prime is 21201310660171. The next prime is 21201310660241. The reversal of 21201310660201 is 10206601310212.

It is a happy number.

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 21201310660201 - 2¹¹ = 21201310658153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201310660241) 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, 6717580 + ... + 9355666.

It is an arithmetic number, because the mean of its divisors is an integer number (3028762451920).

Almost surely, 2^{21201310660201} is an apocalyptic number.

It is an amenable number.

21201310660201 is a deficient number, since it is larger than the sum of its proper divisors (3028788955159).

21201310660201 is a wasteful number, since it uses less digits than its factorization.

21201310660201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786183.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 21201310660201 its reverse (10206601310212), we get a palindrome (31407911970413).

The spelling of 21201310660201 in words is "twenty-one trillion, two hundred one billion, three hundred ten million, six hundred sixty thousand, two hundred one".