1302342221 has 2 divisors, whose sum is σ = 1302342222. Its totient is φ = 1302342220.

The previous prime is 1302342193. The next prime is 1302342263. The reversal of 1302342221 is 1222432031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1301044900 + 1297321 = 36070^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302342221 - 2⁶ = 1302342157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302342193 and 1302342202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1302342281) 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, 651171110 + 651171111.

It is an arithmetic number, because the mean of its divisors is an integer number (651171111).

Almost surely, 2^1302342221 is an apocalyptic number.

It is an amenable number.

1302342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302342221 is an equidigital number, since it uses as much as digits as its factorization.

1302342221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1302342221 is about 36087.9788987968. The cubic root of 1302342221 is about 1092.0479470711.

Adding to 1302342221 its reverse (1222432031), we get a palindrome (2524774252).

The spelling of 1302342221 in words is "one billion, three hundred two million, three hundred forty-two thousand, two hundred twenty-one".