20126256127099 has 2 divisors, whose sum is σ = 20126256127100. Its totient is φ = 20126256127098.

The previous prime is 20126256127007. The next prime is 20126256127141. The reversal of 20126256127099 is 99072165262102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20126256127099 - 2⁷ = 20126256126971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20126256127699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063128063549 + 10063128063550.

It is an arithmetic number, because the mean of its divisors is an integer number (10063128063550).

Almost surely, 2^{20126256127099} is an apocalyptic number.

20126256127099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126256127099 is an equidigital number, since it uses as much as digits as its factorization.

20126256127099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 20126256127099 in words is "twenty trillion, one hundred twenty-six billion, two hundred fifty-six million, one hundred twenty-seven thousand, ninety-nine".