12011221133221 has 2 divisors, whose sum is σ = 12011221133222. Its totient is φ = 12011221133220.

The previous prime is 12011221133089. The next prime is 12011221133237. The reversal of 12011221133221 is 12233112211021.

It is a happy number.

12011221133221 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., 9499408216321 + 2511812916900 = 3082111^2 + 1584870^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011221133221 - 2³⁵ = 11976861394853 is a prime.

It is a super-2 number, since 2×12011221133221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011221133192 and 12011221133201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011221136221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005610566610 + 6005610566611.

It is an arithmetic number, because the mean of its divisors is an integer number (6005610566611).

Almost surely, 2^{12011221133221} is an apocalyptic number.

It is an amenable number.

12011221133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011221133221 is an equidigital number, since it uses as much as digits as its factorization.

12011221133221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12011221133221 its reverse (12233112211021), we get a palindrome (24244333344242).

The spelling of 12011221133221 in words is "twelve trillion, eleven billion, two hundred twenty-one million, one hundred thirty-three thousand, two hundred twenty-one".