1443631166221 has 2 divisors, whose sum is σ = 1443631166222. Its totient is φ = 1443631166220.

The previous prime is 1443631166077. The next prime is 1443631166233. The reversal of 1443631166221 is 1226611363441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254536643721 + 189094522500 = 1120061^2 + 434850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1443631166221 - 2⁹ = 1443631165709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1443631106221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721815583110 + 721815583111.

It is an arithmetic number, because the mean of its divisors is an integer number (721815583111).

Almost surely, 2^{1443631166221} is an apocalyptic number.

It is an amenable number.

1443631166221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1443631166221 is an equidigital number, since it uses as much as digits as its factorization.

1443631166221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The spelling of 1443631166221 in words is "one trillion, four hundred forty-three billion, six hundred thirty-one million, one hundred sixty-six thousand, two hundred twenty-one".