1211322313 has 2 divisors, whose sum is σ = 1211322314. Its totient is φ = 1211322312.

The previous prime is 1211322253. The next prime is 1211322319. The reversal of 1211322313 is 3132231121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1187974089 + 23348224 = 34467^2 + 4832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211322313 - 2¹³ = 1211314121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211322319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605661156 + 605661157.

It is an arithmetic number, because the mean of its divisors is an integer number (605661157).

Almost surely, 2^1211322313 is an apocalyptic number.

It is an amenable number.

1211322313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211322313 is an equidigital number, since it uses as much as digits as its factorization.

1211322313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1211322313 is about 34804.0559848992. The cubic root of 1211322313 is about 1065.9902661657.

Adding to 1211322313 its reverse (3132231121), we get a palindrome (4343553434).

The spelling of 1211322313 in words is "one billion, two hundred eleven million, three hundred twenty-two thousand, three hundred thirteen".