1201312213 has 2 divisors, whose sum is σ = 1201312214. Its totient is φ = 1201312212.

The previous prime is 1201312207. The next prime is 1201312243. The reversal of 1201312213 is 3122131021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1193149764 + 8162449 = 34542^2 + 2857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201312213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201312243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600656106 + 600656107.

It is an arithmetic number, because the mean of its divisors is an integer number (600656107).

Almost surely, 2^1201312213 is an apocalyptic number.

It is an amenable number.

1201312213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201312213 is an equidigital number, since it uses as much as digits as its factorization.

1201312213 is an evil number, because the sum of its binary digits is even.

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

The square root of 1201312213 is about 34659.9511396078. The cubic root of 1201312213 is about 1063.0457709663.

Adding to 1201312213 its reverse (3122131021), we get a palindrome (4323443234).

The spelling of 1201312213 in words is "one billion, two hundred one million, three hundred twelve thousand, two hundred thirteen".