11978932213 has 2 divisors, whose sum is σ = 11978932214. Its totient is φ = 11978932212.

The previous prime is 11978932193. The next prime is 11978932219. The reversal of 11978932213 is 31223987911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11961140689 + 17791524 = 109367^2 + 4218^2 .

It is a cyclic number.

It is not a de Polignac number, because 11978932213 - 2⁵ = 11978932181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11978932219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989466106 + 5989466107.

It is an arithmetic number, because the mean of its divisors is an integer number (5989466107).

Almost surely, 2^11978932213 is an apocalyptic number.

It is an amenable number.

11978932213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978932213 is an equidigital number, since it uses as much as digits as its factorization.

11978932213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The spelling of 11978932213 in words is "eleven billion, nine hundred seventy-eight million, nine hundred thirty-two thousand, two hundred thirteen".