1201310213 has 4 divisors (see below), whose sum is σ = 1207947468. Its totient is φ = 1194672960.

The previous prime is 1201310203. The next prime is 1201310237. The reversal of 1201310213 is 3120131021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 455310244 + 745999969 = 21338^2 + 27313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201310213 - 2⁴ = 1201310197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201310203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3318356 + ... + 3318717.

It is an arithmetic number, because the mean of its divisors is an integer number (301986867).

Almost surely, 2^1201310213 is an apocalyptic number.

It is an amenable number.

1201310213 is a deficient number, since it is larger than the sum of its proper divisors (6637255).

1201310213 is an equidigital number, since it uses as much as digits as its factorization.

1201310213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6637254.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1201310213 is about 34659.9222878529. The cubic root of 1201310213 is about 1063.0451810301.

Adding to 1201310213 its reverse (3120131021), we get a palindrome (4321441234).

It can be divided in two parts, 120131021 and 3, that multiplied together give a palindrome (360393063).

The spelling of 1201310213 in words is "one billion, two hundred one million, three hundred ten thousand, two hundred thirteen".