1001221343 has 2 divisors, whose sum is σ = 1001221344. Its totient is φ = 1001221342.

The previous prime is 1001221301. The next prime is 1001221373. The reversal of 1001221343 is 3431221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001221343 - 2¹⁶ = 1001155807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001221373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610671 + 500610672.

It is an arithmetic number, because the mean of its divisors is an integer number (500610672).

Almost surely, 2^1001221343 is an apocalyptic number.

1001221343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221343 is an equidigital number, since it uses as much as digits as its factorization.

1001221343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1001221343 is about 31642.0818373254. The cubic root of 1001221343 is about 1000.4069487036.

Adding to 1001221343 its reverse (3431221001), we get a palindrome (4432442344).

The spelling of 1001221343 in words is "one billion, one million, two hundred twenty-one thousand, three hundred forty-three".