21210213201 has 16 divisors (see below), whose sum is σ = 28767851520. Its totient is φ = 13896496080.

The previous prime is 21210213179. The next prime is 21210213263. The reversal of 21210213201 is 10231201212.

It is not a de Polignac number, because 21210213201 - 2⁹ = 21210212689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210213281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682716 + ... + 713106.

It is an arithmetic number, because the mean of its divisors is an integer number (1797990720).

Almost surely, 2^21210213201 is an apocalyptic number.

It is an amenable number.

21210213201 is a deficient number, since it is larger than the sum of its proper divisors (7557638319).

21210213201 is a wasteful number, since it uses less digits than its factorization.

21210213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34396.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21210213201 its reverse (10231201212), we get a palindrome (31441414413).

The spelling of 21210213201 in words is "twenty-one billion, two hundred ten million, two hundred thirteen thousand, two hundred one".