1302221161 has 2 divisors, whose sum is σ = 1302221162. Its totient is φ = 1302221160.

The previous prime is 1302221149. The next prime is 1302221171. The reversal of 1302221161 is 1611222031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984704400 + 317516761 = 31380^2 + 17819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302221161 - 2⁹ = 1302220649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1302221171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651110580 + 651110581.

It is an arithmetic number, because the mean of its divisors is an integer number (651110581).

Almost surely, 2^1302221161 is an apocalyptic number.

It is an amenable number.

1302221161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302221161 is an equidigital number, since it uses as much as digits as its factorization.

1302221161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1302221161 is about 36086.3015699864. The cubic root of 1302221161 is about 1092.0141086993.

Adding to 1302221161 its reverse (1611222031), we get a palindrome (2913443192).

The spelling of 1302221161 in words is "one billion, three hundred two million, two hundred twenty-one thousand, one hundred sixty-one".