11512202204221 has 2 divisors, whose sum is σ = 11512202204222. Its totient is φ = 11512202204220.

The previous prime is 11512202204189. The next prime is 11512202204263. The reversal of 11512202204221 is 12240220221511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11250456388900 + 261745815321 = 3354170^2 + 511611^2 .

It is an emirp because it is prime and its reverse (12240220221511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11512202204221 - 2⁵ = 11512202204189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11512203204221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756101102110 + 5756101102111.

It is an arithmetic number, because the mean of its divisors is an integer number (5756101102111).

Almost surely, 2^{11512202204221} is an apocalyptic number.

It is an amenable number.

11512202204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512202204221 is an equidigital number, since it uses as much as digits as its factorization.

11512202204221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 11512202204221 its reverse (12240220221511), we get a palindrome (23752422425732).

The spelling of 11512202204221 in words is "eleven trillion, five hundred twelve billion, two hundred two million, two hundred four thousand, two hundred twenty-one".