1202321161 has 2 divisors, whose sum is σ = 1202321162. Its totient is φ = 1202321160.

The previous prime is 1202321137. The next prime is 1202321167. The reversal of 1202321161 is 1611232021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673091136 + 529230025 = 25944^2 + 23005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202321161 - 2⁷ = 1202321033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202321167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601160580 + 601160581.

It is an arithmetic number, because the mean of its divisors is an integer number (601160581).

Almost surely, 2^1202321161 is an apocalyptic number.

It is an amenable number.

1202321161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202321161 is an equidigital number, since it uses as much as digits as its factorization.

1202321161 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1202321161 is about 34674.5030389766. The cubic root of 1202321161 is about 1063.3432950023.

Adding to 1202321161 its reverse (1611232021), we get a palindrome (2813553182).

The spelling of 1202321161 in words is "one billion, two hundred two million, three hundred twenty-one thousand, one hundred sixty-one".