102012099999 has 4 divisors (see below), whose sum is σ = 136016133336. Its totient is φ = 68008066664.

The previous prime is 102012099953. The next prime is 102012100027. The reversal of 102012099999 is 999990210201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102012099999 - 2¹⁶ = 102012034463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012099199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17002016664 + ... + 17002016669.

It is an arithmetic number, because the mean of its divisors is an integer number (34004033334).

Almost surely, 2^102012099999 is an apocalyptic number.

102012099999 is a deficient number, since it is larger than the sum of its proper divisors (34004033337).

102012099999 is an equidigital number, since it uses as much as digits as its factorization.

102012099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34004033336.

The product of its (nonzero) digits is 236196, while the sum is 51.

The spelling of 102012099999 in words is "one hundred two billion, twelve million, ninety-nine thousand, nine hundred ninety-nine".