21223122201 has 48 divisors (see below), whose sum is σ = 33441583680. Its totient is φ = 13299886080.

The previous prime is 21223122191. The next prime is 21223122209. The reversal of 21223122201 is 10222132212.

21223122201 is a `hidden beast` number, since 212 + 231 + 2 + 220 + 1 = 666.

It is not a de Polignac number, because 21223122201 - 2⁵ = 21223122169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223122209) 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 47 ways as a sum of consecutive naturals, for example, 10197481 + ... + 10199561.

It is an arithmetic number, because the mean of its divisors is an integer number (696699660).

Almost surely, 2^21223122201 is an apocalyptic number.

It is an amenable number.

21223122201 is a deficient number, since it is larger than the sum of its proper divisors (12218461479).

21223122201 is a wasteful number, since it uses less digits than its factorization.

21223122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431 (or 3408 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21223122201 its reverse (10222132212), we get a palindrome (31445254413).

It can be divided in two parts, 212231 and 22201, that added together give a palindrome (234432).

The spelling of 21223122201 in words is "twenty-one billion, two hundred twenty-three million, one hundred twenty-two thousand, two hundred one".