1211313413 has 2 divisors, whose sum is σ = 1211313414. Its totient is φ = 1211313412.

The previous prime is 1211313401. The next prime is 1211313451. The reversal of 1211313413 is 3143131121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028035969 + 183277444 = 32063^2 + 13538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211313413 - 2⁶ = 1211313349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211313613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605656706 + 605656707.

It is an arithmetic number, because the mean of its divisors is an integer number (605656707).

Almost surely, 2^1211313413 is an apocalyptic number.

It is an amenable number.

1211313413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211313413 is an equidigital number, since it uses as much as digits as its factorization.

1211313413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 1211313413 is about 34803.9281260032. The cubic root of 1211313413 is about 1065.9876554274.

Adding to 1211313413 its reverse (3143131121), we get a palindrome (4354444534).

The spelling of 1211313413 in words is "one billion, two hundred eleven million, three hundred thirteen thousand, four hundred thirteen".