21220110201 has 16 divisors (see below), whose sum is σ = 29815954560. Its totient is φ = 13397683200.

The previous prime is 21220110169. The next prime is 21220110211. The reversal of 21220110201 is 10201102212.

It is not a de Polignac number, because 21220110201 - 2⁵ = 21220110169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220110211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1515496 + ... + 1529433.

It is an arithmetic number, because the mean of its divisors is an integer number (1863497160).

Almost surely, 2^21220110201 is an apocalyptic number.

It is an amenable number.

21220110201 is a deficient number, since it is larger than the sum of its proper divisors (8595844359).

21220110201 is a wasteful number, since it uses less digits than its factorization.

21220110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045056.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21220110201 its reverse (10201102212), we get a palindrome (31421212413).

The spelling of 21220110201 in words is "twenty-one billion, two hundred twenty million, one hundred ten thousand, two hundred one".