21202221202201 has 8 divisors (see below), whose sum is σ = 22853385545480. Its totient is φ = 19553946037632.

The previous prime is 21202221202157. The next prime is 21202221202213. The reversal of 21202221202201 is 10220212220212.

It can be written as a sum of positive squares in 4 ways, for example, as 834591873600 + 20367629328601 = 913560^2 + 4513051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202221202201 - 2²⁷ = 21202086984473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202221202901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722279430 + ... + 722308783.

It is an arithmetic number, because the mean of its divisors is an integer number (2856673193185).

Almost surely, 2^{21202221202201} is an apocalyptic number.

It is an amenable number.

21202221202201 is a deficient number, since it is larger than the sum of its proper divisors (1651164343279).

21202221202201 is a wasteful number, since it uses less digits than its factorization.

21202221202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444589355.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202221202201 its reverse (10220212220212), we get a palindrome (31422433422413).

The spelling of 21202221202201 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, two hundred two thousand, two hundred one".