1202311321 has 2 divisors, whose sum is σ = 1202311322. Its totient is φ = 1202311320.

The previous prime is 1202311273. The next prime is 1202311339. The reversal of 1202311321 is 1231132021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101509721 + 100801600 = 33189^2 + 10040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202311321 - 2¹³ = 1202303129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202311295 and 1202311304.

It is not a weakly prime, because it can be changed into another prime (1202311351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601155660 + 601155661.

It is an arithmetic number, because the mean of its divisors is an integer number (601155661).

Almost surely, 2^1202311321 is an apocalyptic number.

It is an amenable number.

1202311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202311321 is an equidigital number, since it uses as much as digits as its factorization.

1202311321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1202311321 is about 34674.3611476837. The cubic root of 1202311321 is about 1063.3403941338.

Adding to 1202311321 its reverse (1231132021), we get a palindrome (2433443342).

The spelling of 1202311321 in words is "one billion, two hundred two million, three hundred eleven thousand, three hundred twenty-one".