12143979961 has 2 divisors, whose sum is σ = 12143979962. Its totient is φ = 12143979960.

The previous prime is 12143979949. The next prime is 12143979997. The reversal of 12143979961 is 16997934121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7145489961 + 4998490000 = 84531^2 + 70700^2 .

It is a cyclic number.

It is not a de Polignac number, because 12143979961 - 2⁷ = 12143979833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12143979899 and 12143979908.

It is not a weakly prime, because it can be changed into another prime (12143979761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071989980 + 6071989981.

It is an arithmetic number, because the mean of its divisors is an integer number (6071989981).

Almost surely, 2^12143979961 is an apocalyptic number.

It is an amenable number.

12143979961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12143979961 is an equidigital number, since it uses as much as digits as its factorization.

12143979961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The spelling of 12143979961 in words is "twelve billion, one hundred forty-three million, nine hundred seventy-nine thousand, nine hundred sixty-one".