1212323141 has 2 divisors, whose sum is σ = 1212323142. Its totient is φ = 1212323140.

The previous prime is 1212323129. The next prime is 1212323143. The reversal of 1212323141 is 1413232121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138792516 + 73530625 = 33746^2 + 8575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212323141 is a prime.

It is a Sophie Germain prime.

Together with 1212323143, it forms a pair of twin primes.

It is a Chen 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 (1212323143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606161570 + 606161571.

It is an arithmetic number, because the mean of its divisors is an integer number (606161571).

Almost surely, 2^1212323141 is an apocalyptic number.

It is an amenable number.

1212323141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212323141 is an equidigital number, since it uses as much as digits as its factorization.

1212323141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 1212323141 is about 34818.4310531075. The cubic root of 1212323141 is about 1066.2837688949.

Adding to 1212323141 its reverse (1413232121), we get a palindrome (2625555262).

The spelling of 1212323141 in words is "one billion, two hundred twelve million, three hundred twenty-three thousand, one hundred forty-one".