21202118201 has 8 divisors (see below), whose sum is σ = 23230588800. Its totient is φ = 19190481840.

The previous prime is 21202118141. The next prime is 21202118227. The reversal of 21202118201 is 10281120212.

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 21202118201 - 2⁶ = 21202118137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202118291) 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, 4205921 + ... + 4210958.

It is an arithmetic number, because the mean of its divisors is an integer number (2903823600).

Almost surely, 2^21202118201 is an apocalyptic number.

It is an amenable number.

21202118201 is a deficient number, since it is larger than the sum of its proper divisors (2028470599).

21202118201 is a wasteful number, since it uses less digits than its factorization.

21202118201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417119.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21202118201 its reverse (10281120212), we get a palindrome (31483238413).

The spelling of 21202118201 in words is "twenty-one billion, two hundred two million, one hundred eighteen thousand, two hundred one".