1322021243 has 4 divisors (see below), whose sum is σ = 1328871288. Its totient is φ = 1315171200.

The previous prime is 1322021227. The next prime is 1322021249. The reversal of 1322021243 is 3421202231.

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

It is a cyclic number.

It is not a de Polignac number, because 1322021243 - 2⁴ = 1322021227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1322021249) 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, 3424733 + ... + 3425118.

It is an arithmetic number, because the mean of its divisors is an integer number (332217822).

Almost surely, 2^1322021243 is an apocalyptic number.

1322021243 is a deficient number, since it is larger than the sum of its proper divisors (6850045).

1322021243 is an equidigital number, since it uses as much as digits as its factorization.

1322021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850044.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1322021243 is about 36359.6100501642. The cubic root of 1322021243 is about 1097.5209303418.

Adding to 1322021243 its reverse (3421202231), we get a palindrome (4743223474).

The spelling of 1322021243 in words is "one billion, three hundred twenty-two million, twenty-one thousand, two hundred forty-three".