202201000212221 has 4 divisors (see below), whose sum is σ = 202205738193372. Its totient is φ = 202196262231072.

The previous prime is 202201000212181. The next prime is 202201000212223. The reversal of 202201000212221 is 122212000102202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177731851855321 + 24469148356900 = 13331611^2 + 4946630^2 .

It is a cyclic number.

It is not a de Polignac number, because 202201000212221 - 2¹⁸ = 202200999950077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202201000212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202201000212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368926560 + ... + 2369011913.

It is an arithmetic number, because the mean of its divisors is an integer number (50551434548343).

Almost surely, 2^{202201000212221} is an apocalyptic number.

It is an amenable number.

202201000212221 is a deficient number, since it is larger than the sum of its proper divisors (4737981151).

202201000212221 is an equidigital number, since it uses as much as digits as its factorization.

202201000212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737981150.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202201000212221 its reverse (122212000102202), we get a palindrome (324413000314423).

The spelling of 202201000212221 in words is "two hundred two trillion, two hundred one billion, two hundred twelve thousand, two hundred twenty-one".