10121099999 has 2 divisors, whose sum is σ = 10121100000. Its totient is φ = 10121099998.

The previous prime is 10121099993. The next prime is 10121100019. The reversal of 10121099999 is 99999012101.

10121099999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10121099999 - 2⁸ = 10121099743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121099993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060549999 + 5060550000.

It is an arithmetic number, because the mean of its divisors is an integer number (5060550000).

Almost surely, 2^10121099999 is an apocalyptic number.

10121099999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121099999 is an equidigital number, since it uses as much as digits as its factorization.

10121099999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 50.

It can be divided in two parts, 1012 and 1099999, that added together give a palindrome (1101011).

The spelling of 10121099999 in words is "ten billion, one hundred twenty-one million, ninety-nine thousand, nine hundred ninety-nine".