21232220201 has 16 divisors (see below), whose sum is σ = 21696491520. Its totient is φ = 20771723280.

The previous prime is 21232220183. The next prime is 21232220257. The reversal of 21232220201 is 10202223212.

It is a cyclic number.

It is not a de Polignac number, because 21232220201 - 2³⁰ = 20158478377 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 21232220201.

It is not an unprimeable number, because it can be changed into a prime (21232220701) 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 15 ways as a sum of consecutive naturals, for example, 13411856 + ... + 13413438.

It is an arithmetic number, because the mean of its divisors is an integer number (1356030720).

Almost surely, 2^21232220201 is an apocalyptic number.

It is an amenable number.

21232220201 is a deficient number, since it is larger than the sum of its proper divisors (464271319).

21232220201 is a wasteful number, since it uses less digits than its factorization.

21232220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21232220201 its reverse (10202223212), we get a palindrome (31434443413).

The spelling of 21232220201 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty thousand, two hundred one".