10121299999 has 2 divisors, whose sum is σ = 10121300000. Its totient is φ = 10121299998.

The previous prime is 10121299987. The next prime is 10121300069. The reversal of 10121299999 is 99999212101.

10121299999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (99999212101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10121299999 - 2¹⁷ = 10121168927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121299499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060649999 + 5060650000.

It is an arithmetic number, because the mean of its divisors is an integer number (5060650000).

Almost surely, 2^10121299999 is an apocalyptic number.

10121299999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121299999 is an equidigital number, since it uses as much as digits as its factorization.

10121299999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 52.

The spelling of 10121299999 in words is "ten billion, one hundred twenty-one million, two hundred ninety-nine thousand, nine hundred ninety-nine".