11556232213 has 2 divisors, whose sum is σ = 11556232214. Its totient is φ = 11556232212.

The previous prime is 11556232153. The next prime is 11556232249. The reversal of 11556232213 is 31223265511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11202528964 + 353703249 = 105842^2 + 18807^2 .

It is a cyclic number.

It is not a de Polignac number, because 11556232213 - 2¹³ = 11556224021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11556232253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778116106 + 5778116107.

It is an arithmetic number, because the mean of its divisors is an integer number (5778116107).

Almost surely, 2^11556232213 is an apocalyptic number.

It is an amenable number.

11556232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556232213 is an equidigital number, since it uses as much as digits as its factorization.

11556232213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

Adding to 11556232213 its reverse (31223265511), we get a palindrome (42779497724).

The spelling of 11556232213 in words is "eleven billion, five hundred fifty-six million, two hundred thirty-two thousand, two hundred thirteen".