11001201101221 has 2 divisors, whose sum is σ = 11001201101222. Its totient is φ = 11001201101220.

The previous prime is 11001201101201. The next prime is 11001201101227. The reversal of 11001201101221 is 12210110210011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10295685098721 + 705516002500 = 3208689^2 + 839950^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001201101221 - 2²¹ = 11001199004069 is a prime.

It is a super-2 number, since 2×11001201101221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001201101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500600550610 + 5500600550611.

It is an arithmetic number, because the mean of its divisors is an integer number (5500600550611).

Almost surely, 2^{11001201101221} is an apocalyptic number.

It is an amenable number.

11001201101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001201101221 is an equidigital number, since it uses as much as digits as its factorization.

11001201101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001201101221 its reverse (12210110210011), we get a palindrome (23211311311232).

The spelling of 11001201101221 in words is "eleven trillion, one billion, two hundred one million, one hundred one thousand, two hundred twenty-one".