21202202202201 has 6 divisors (see below), whose sum is σ = 30625403180970. Its totient is φ = 14134801468128.

The previous prime is 21202202202193. The next prime is 21202202202271. The reversal of 21202202202201 is 10220220220212.

21202202202201 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 220 + 220 + 220 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20477652250176 + 724549952025 = 4525224^2 + 851205^2 .

It is not a de Polignac number, because 21202202202201 - 2³ = 21202202202193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202202202271) 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 5 ways as a sum of consecutive naturals, for example, 1177900122336 + ... + 1177900122353.

It is an arithmetic number, because the mean of its divisors is an integer number (5104233863495).

Almost surely, 2^{21202202202201} is an apocalyptic number.

It is an amenable number.

21202202202201 is a deficient number, since it is larger than the sum of its proper divisors (9423200978769).

21202202202201 is a wasteful number, since it uses less digits than its factorization.

21202202202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355800244695 (or 2355800244692 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21202202202201 its reverse (10220220220212), we get a palindrome (31422422422413).

The spelling of 21202202202201 in words is "twenty-one trillion, two hundred two billion, two hundred two million, two hundred two thousand, two hundred one".