12551333213 has 2 divisors, whose sum is σ = 12551333214. Its totient is φ = 12551333212.

The previous prime is 12551333209. The next prime is 12551333219. The reversal of 12551333213 is 31233315521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7978598329 + 4572734884 = 89323^2 + 67622^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551333213 - 2² = 12551333209 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 (12551333219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275666606 + 6275666607.

It is an arithmetic number, because the mean of its divisors is an integer number (6275666607).

Almost surely, 2^12551333213 is an apocalyptic number.

It is an amenable number.

12551333213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551333213 is an equidigital number, since it uses as much as digits as its factorization.

12551333213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 29.

Adding to 12551333213 its reverse (31233315521), we get a palindrome (43784648734).

The spelling of 12551333213 in words is "twelve billion, five hundred fifty-one million, three hundred thirty-three thousand, two hundred thirteen".