1320221204 has 6 divisors (see below), whose sum is σ = 2310387114. Its totient is φ = 660110600.

The previous prime is 1320221179. The next prime is 1320221209. The reversal of 1320221204 is 4021220231.

It can be written as a sum of positive squares in only one way, i.e., 745180804 + 575040400 = 27298^2 + 23980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320221209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165027647 + ... + 165027654.

It is an arithmetic number, because the mean of its divisors is an integer number (385064519).

Almost surely, 2^1320221204 is an apocalyptic number.

It is an amenable number.

1320221204 is a deficient number, since it is larger than the sum of its proper divisors (990165910).

1320221204 is a wasteful number, since it uses less digits than its factorization.

1320221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330055305 (or 330055303 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1320221204 is about 36334.8483415027. The cubic root of 1320221204 is about 1097.0225828796.

Adding to 1320221204 its reverse (4021220231), we get a palindrome (5341441435).

The spelling of 1320221204 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, two hundred four".