1141643221 has 2 divisors, whose sum is σ = 1141643222. Its totient is φ = 1141643220.

The previous prime is 1141643213. The next prime is 1141643233. The reversal of 1141643221 is 1223461411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729756196 + 411887025 = 27014^2 + 20295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1141643221 - 2³ = 1141643213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1141643281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570821610 + 570821611.

It is an arithmetic number, because the mean of its divisors is an integer number (570821611).

Almost surely, 2^1141643221 is an apocalyptic number.

It is an amenable number.

1141643221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1141643221 is an equidigital number, since it uses as much as digits as its factorization.

1141643221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 1141643221 is about 33788.2112725726. The cubic root of 1141643221 is about 1045.1456100754.

The spelling of 1141643221 in words is "one billion, one hundred forty-one million, six hundred forty-three thousand, two hundred twenty-one".