1356080221 has 2 divisors, whose sum is σ = 1356080222. Its totient is φ = 1356080220.

The previous prime is 1356080183. The next prime is 1356080239. The reversal of 1356080221 is 1220806531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1353872025 + 2208196 = 36795^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356080221 - 2¹¹ = 1356078173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1356080221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356080261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678040110 + 678040111.

It is an arithmetic number, because the mean of its divisors is an integer number (678040111).

Almost surely, 2^1356080221 is an apocalyptic number.

It is an amenable number.

1356080221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356080221 is an equidigital number, since it uses as much as digits as its factorization.

1356080221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1356080221 is about 36824.9945145957. The cubic root of 1356080221 is about 1106.8662037484.

Adding to 1356080221 its reverse (1220806531), we get a palindrome (2576886752).

The spelling of 1356080221 in words is "one billion, three hundred fifty-six million, eighty thousand, two hundred twenty-one".