102102199987 has 2 divisors, whose sum is σ = 102102199988. Its totient is φ = 102102199986.

The previous prime is 102102199967. The next prime is 102102200027. The reversal of 102102199987 is 789991201201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102199987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102102199987.

It is not a weakly prime, because it can be changed into another prime (102102199967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051099993 + 51051099994.

It is an arithmetic number, because the mean of its divisors is an integer number (51051099994).

Almost surely, 2^102102199987 is an apocalyptic number.

102102199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102199987 is an equidigital number, since it uses as much as digits as its factorization.

102102199987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 102102199987 in words is "one hundred two billion, one hundred two million, one hundred ninety-nine thousand, nine hundred eighty-seven".