1322020221 has 4 divisors (see below), whose sum is σ = 1762693632. Its totient is φ = 881346812.

The previous prime is 1322020211. The next prime is 1322020229. The reversal of 1322020221 is 1220202231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1322020221 - 2⁷ = 1322020093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1322020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322020229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220336701 + ... + 220336706.

It is an arithmetic number, because the mean of its divisors is an integer number (440673408).

Almost surely, 2^1322020221 is an apocalyptic number.

It is an amenable number.

1322020221 is a deficient number, since it is larger than the sum of its proper divisors (440673411).

1322020221 is an equidigital number, since it uses as much as digits as its factorization.

1322020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440673410.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1322020221 is about 36359.5959961053. The cubic root of 1322020221 is about 1097.5206475257.

Adding to 1322020221 its reverse (1220202231), we get a palindrome (2542222452).

The spelling of 1322020221 in words is "one billion, three hundred twenty-two million, twenty thousand, two hundred twenty-one".