1333121201221 has 2 divisors, whose sum is σ = 1333121201222. Its totient is φ = 1333121201220.

The previous prime is 1333121201201. The next prime is 1333121201239. The reversal of 1333121201221 is 1221021213331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 926523678721 + 406597522500 = 962561^2 + 637650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1333121201221 - 2¹³ = 1333121193029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1333121201192 and 1333121201201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1333121201201) 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, 666560600610 + 666560600611.

It is an arithmetic number, because the mean of its divisors is an integer number (666560600611).

Almost surely, 2^{1333121201221} is an apocalyptic number.

It is an amenable number.

1333121201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1333121201221 is an equidigital number, since it uses as much as digits as its factorization.

1333121201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1333121201221 its reverse (1221021213331), we get a palindrome (2554142414552).

The spelling of 1333121201221 in words is "one trillion, three hundred thirty-three billion, one hundred twenty-one million, two hundred one thousand, two hundred twenty-one".