2202121210221 has 16 divisors (see below), whose sum is σ = 3265622368320. Its totient is φ = 1466631547920.

The previous prime is 2202121210171. The next prime is 2202121210229. The reversal of 2202121210221 is 1220121212022.

It is a happy number.

2202121210221 is a `hidden beast` number, since 2 + 20 + 212 + 1 + 210 + 221 = 666.

It is not a de Polignac number, because 2202121210221 - 2¹⁵ = 2202121177453 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2202121210194 and 2202121210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202121210229) 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, 40229335 + ... + 40284036.

It is an arithmetic number, because the mean of its divisors is an integer number (204101398020).

Almost surely, 2^{2202121210221} is an apocalyptic number.

It is an amenable number.

2202121210221 is a deficient number, since it is larger than the sum of its proper divisors (1063501158099).

2202121210221 is a wasteful number, since it uses less digits than its factorization.

2202121210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80514393 (or 80514387 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2202121210221 its reverse (1220121212022), we get a palindrome (3422242422243).

The spelling of 2202121210221 in words is "two trillion, two hundred two billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".