10121309999 has 2 divisors, whose sum is σ = 10121310000. Its totient is φ = 10121309998.

The previous prime is 10121309983. The next prime is 10121310107. The reversal of 10121309999 is 99990312101.

It is a weak prime.

It is an emirp because it is prime and its reverse (99990312101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10121309999 - 2⁴ = 10121309983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121309969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060654999 + 5060655000.

It is an arithmetic number, because the mean of its divisors is an integer number (5060655000).

Almost surely, 2^10121309999 is an apocalyptic number.

10121309999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121309999 is an equidigital number, since it uses as much as digits as its factorization.

10121309999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 10121309999 in words is "ten billion, one hundred twenty-one million, three hundred nine thousand, nine hundred ninety-nine".