1236130213 has 4 divisors (see below), whose sum is σ = 1248369228. Its totient is φ = 1223891200.

The previous prime is 1236130201. The next prime is 1236130271. The reversal of 1236130213 is 3120316321.

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 844367364 + 391762849 = 29058^2 + 19793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1236130213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236130013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6119356 + ... + 6119557.

It is an arithmetic number, because the mean of its divisors is an integer number (312092307).

Almost surely, 2^1236130213 is an apocalyptic number.

It is an amenable number.

1236130213 is a deficient number, since it is larger than the sum of its proper divisors (12239015).

1236130213 is a wasteful number, since it uses less digits than its factorization.

1236130213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239014.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1236130213 is about 35158.6435034118. The cubic root of 1236130213 is about 1073.2183107734.

Adding to 1236130213 its reverse (3120316321), we get a palindrome (4356446534).

The spelling of 1236130213 in words is "one billion, two hundred thirty-six million, one hundred thirty thousand, two hundred thirteen".