1421502323221 has 2 divisors, whose sum is σ = 1421502323222. Its totient is φ = 1421502323220.

The previous prime is 1421502323191. The next prime is 1421502323237. The reversal of 1421502323221 is 1223232051241.

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., 1401228550225 + 20273772996 = 1183735^2 + 142386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421502323221 - 2⁷ = 1421502323093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421502323221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421502323261) 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, 710751161610 + 710751161611.

It is an arithmetic number, because the mean of its divisors is an integer number (710751161611).

Almost surely, 2^{1421502323221} is an apocalyptic number.

It is an amenable number.

1421502323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421502323221 is an equidigital number, since it uses as much as digits as its factorization.

1421502323221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1421502323221 its reverse (1223232051241), we get a palindrome (2644734374462).

The spelling of 1421502323221 in words is "one trillion, four hundred twenty-one billion, five hundred two million, three hundred twenty-three thousand, two hundred twenty-one".