21002202201 has 16 divisors (see below), whose sum is σ = 29642247360. Its totient is φ = 13204269120.

The previous prime is 21002202163. The next prime is 21002202227. The reversal of 21002202201 is 10220220012.

It is not a de Polignac number, because 21002202201 - 2¹⁰ = 21002201177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002202241) 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, 2803290 + ... + 2810771.

It is an arithmetic number, because the mean of its divisors is an integer number (1852640460).

Almost surely, 2^21002202201 is an apocalyptic number.

It is an amenable number.

21002202201 is a deficient number, since it is larger than the sum of its proper divisors (8640045159).

21002202201 is a wasteful number, since it uses less digits than its factorization.

21002202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614136.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002202201 its reverse (10220220012), we get a palindrome (31222422213).

The spelling of 21002202201 in words is "twenty-one billion, two million, two hundred two thousand, two hundred one".