11202311331221 has 2 divisors, whose sum is σ = 11202311331222. Its totient is φ = 11202311331220.

The previous prime is 11202311331163. The next prime is 11202311331271. The reversal of 11202311331221 is 12213311320211.

It is a happy number.

11202311331221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9166513140625 + 2035798190596 = 3027625^2 + 1426814^2 .

It is an emirp because it is prime and its reverse (12213311320211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11202311331221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11202311331271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601155665610 + 5601155665611.

It is an arithmetic number, because the mean of its divisors is an integer number (5601155665611).

Almost surely, 2^{11202311331221} is an apocalyptic number.

It is an amenable number.

11202311331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11202311331221 is an equidigital number, since it uses as much as digits as its factorization.

11202311331221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11202311331221 its reverse (12213311320211), we get a palindrome (23415622651432).

The spelling of 11202311331221 in words is "eleven trillion, two hundred two billion, three hundred eleven million, three hundred thirty-one thousand, two hundred twenty-one".