1043221321 has 4 divisors (see below), whose sum is σ = 1079194500. Its totient is φ = 1007248144.

The previous prime is 1043221297. The next prime is 1043221349. The reversal of 1043221321 is 1231223401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 876811321 + 166410000 = 29611^2 + 12900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043221321 - 2¹¹ = 1043219273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043221381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17986546 + ... + 17986603.

It is an arithmetic number, because the mean of its divisors is an integer number (269798625).

Almost surely, 2^1043221321 is an apocalyptic number.

It is an amenable number.

1043221321 is a deficient number, since it is larger than the sum of its proper divisors (35973179).

1043221321 is an equidigital number, since it uses as much as digits as its factorization.

1043221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35973178.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1043221321 is about 32298.9368400881. The cubic root of 1043221321 is about 1014.2043870736.

Adding to 1043221321 its reverse (1231223401), we get a palindrome (2274444722).

The spelling of 1043221321 in words is "one billion, forty-three million, two hundred twenty-one thousand, three hundred twenty-one".