143221512221 has 2 divisors, whose sum is σ = 143221512222. Its totient is φ = 143221512220.

The previous prime is 143221512169. The next prime is 143221512283. The reversal of 143221512221 is 122215122341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141572340121 + 1649172100 = 376261^2 + 40610^2 .

It is a cyclic number.

It is not a de Polignac number, because 143221512221 - 2¹⁰ = 143221511197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143221514221) 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, 71610756110 + 71610756111.

It is an arithmetic number, because the mean of its divisors is an integer number (71610756111).

Almost surely, 2^143221512221 is an apocalyptic number.

It is an amenable number.

143221512221 is a deficient number, since it is larger than the sum of its proper divisors (1).

143221512221 is an equidigital number, since it uses as much as digits as its factorization.

143221512221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

Adding to 143221512221 its reverse (122215122341), we get a palindrome (265436634562).

The spelling of 143221512221 in words is "one hundred forty-three billion, two hundred twenty-one million, five hundred twelve thousand, two hundred twenty-one".