22002112011221 has 4 divisors (see below), whose sum is σ = 23296353894252. Its totient is φ = 20707870128192.

The previous prime is 22002112011199. The next prime is 22002112011239. The reversal of 22002112011221 is 12211021120022.

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 8498618427121 + 13503493584100 = 2915239^2 + 3674710^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002112011221 - 2¹⁸ = 22002111749077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1294241883013 = 22002112011221 / (2 + 2 + 0 + 0 + 2 + 1 + 1 + 2 + 0 + 1 + 1 + 2 + 2 + 1).

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 22002112011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002112071221) 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 3 ways as a sum of consecutive naturals, for example, 647120941490 + ... + 647120941523.

It is an arithmetic number, because the mean of its divisors is an integer number (5824088473563).

Almost surely, 2^{22002112011221} is an apocalyptic number.

It is an amenable number.

22002112011221 is a deficient number, since it is larger than the sum of its proper divisors (1294241883031).

22002112011221 is a wasteful number, since it uses less digits than its factorization.

22002112011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294241883030.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22002112011221 its reverse (12211021120022), we get a palindrome (34213133131243).

The spelling of 22002112011221 in words is "twenty-two trillion, two billion, one hundred twelve million, eleven thousand, two hundred twenty-one".