1332212121221 has 2 divisors, whose sum is σ = 1332212121222. Its totient is φ = 1332212121220.

The previous prime is 1332212121217. The next prime is 1332212121223. The reversal of 1332212121221 is 1221212122331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161568773121 + 170643348100 = 1077761^2 + 413090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1332212121221 - 2² = 1332212121217 is a prime.

Together with 1332212121223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1332212121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666106060610 + 666106060611.

It is an arithmetic number, because the mean of its divisors is an integer number (666106060611).

Almost surely, 2^{1332212121221} is an apocalyptic number.

It is an amenable number.

1332212121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1332212121221 is an equidigital number, since it uses as much as digits as its factorization.

1332212121221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

Adding to 1332212121221 its reverse (1221212122331), we get a palindrome (2553424243552).

The spelling of 1332212121221 in words is "one trillion, three hundred thirty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".