1421234033221 has 2 divisors, whose sum is σ = 1421234033222. Its totient is φ = 1421234033220.

The previous prime is 1421234033209. The next prime is 1421234033227. The reversal of 1421234033221 is 1223304321241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835222349025 + 586011684196 = 913905^2 + 765514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421234033221 - 2¹⁵ = 1421234000453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421234033221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421234033227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710617016610 + 710617016611.

It is an arithmetic number, because the mean of its divisors is an integer number (710617016611).

Almost surely, 2^{1421234033221} is an apocalyptic number.

It is an amenable number.

1421234033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421234033221 is an equidigital number, since it uses as much as digits as its factorization.

1421234033221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1421234033221 its reverse (1223304321241), we get a palindrome (2644538354462).

The spelling of 1421234033221 in words is "one trillion, four hundred twenty-one billion, two hundred thirty-four million, thirty-three thousand, two hundred twenty-one".