12161213 has 2 divisors, whose sum is σ = 12161214. Its totient is φ = 12161212.

The previous prime is 12161189. The next prime is 12161251. The reversal of 12161213 is 31216121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10413529 + 1747684 = 3227^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 12161213 - 2⁸ = 12160957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12161191 and 12161200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12161293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6080606 + 6080607.

It is an arithmetic number, because the mean of its divisors is an integer number (6080607).

Almost surely, 2^12161213 is an apocalyptic number.

It is an amenable number.

12161213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161213 is an equidigital number, since it uses as much as digits as its factorization.

12161213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 12161213 is about 3487.2930762986. The cubic root of 12161213 is about 229.9635291888.

Adding to 12161213 its reverse (31216121), we get a palindrome (43377334).

The spelling of 12161213 in words is "twelve million, one hundred sixty-one thousand, two hundred thirteen".