1216802427899 has 2 divisors, whose sum is σ = 1216802427900. Its totient is φ = 1216802427898.

The previous prime is 1216802427859. The next prime is 1216802427917. The reversal of 1216802427899 is 9987242086121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216802427899 - 2³⁶ = 1148082951163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216802427859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608401213949 + 608401213950.

It is an arithmetic number, because the mean of its divisors is an integer number (608401213950).

Almost surely, 2^{1216802427899} is an apocalyptic number.

1216802427899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216802427899 is an equidigital number, since it uses as much as digits as its factorization.

1216802427899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 1216802427899 in words is "one trillion, two hundred sixteen billion, eight hundred two million, four hundred twenty-seven thousand, eight hundred ninety-nine".