1216342427929 has 2 divisors, whose sum is σ = 1216342427930. Its totient is φ = 1216342427928.

The previous prime is 1216342427879. The next prime is 1216342427941. The reversal of 1216342427929 is 9297242436121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210440040000 + 5902387929 = 1100200^2 + 76827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216342427929 - 2⁷ = 1216342427801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216342827929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608171213964 + 608171213965.

It is an arithmetic number, because the mean of its divisors is an integer number (608171213965).

Almost surely, 2^{1216342427929} is an apocalyptic number.

It is an amenable number.

1216342427929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216342427929 is an equidigital number, since it uses as much as digits as its factorization.

1216342427929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The spelling of 1216342427929 in words is "one trillion, two hundred sixteen billion, three hundred forty-two million, four hundred twenty-seven thousand, nine hundred twenty-nine".