126205116899 has 2 divisors, whose sum is σ = 126205116900. Its totient is φ = 126205116898.

The previous prime is 126205116889. The next prime is 126205116911. The reversal of 126205116899 is 998611502621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126205116899 - 2¹⁶ = 126205051363 is a prime.

It is not a weakly prime, because it can be changed into another prime (126205116809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63102558449 + 63102558450.

It is an arithmetic number, because the mean of its divisors is an integer number (63102558450).

Almost surely, 2^126205116899 is an apocalyptic number.

126205116899 is a deficient number, since it is larger than the sum of its proper divisors (1).

126205116899 is an equidigital number, since it uses as much as digits as its factorization.

126205116899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 126205116899 in words is "one hundred twenty-six billion, two hundred five million, one hundred sixteen thousand, eight hundred ninety-nine".