102020111987 has 2 divisors, whose sum is σ = 102020111988. Its totient is φ = 102020111986.

The previous prime is 102020111971. The next prime is 102020112041. The reversal of 102020111987 is 789111020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102020111987 - 2⁴ = 102020111971 is a prime.

It is not a weakly prime, because it can be changed into another prime (102020111387) 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, 51010055993 + 51010055994.

It is an arithmetic number, because the mean of its divisors is an integer number (51010055994).

Almost surely, 2^102020111987 is an apocalyptic number.

102020111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020111987 is an equidigital number, since it uses as much as digits as its factorization.

102020111987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 102020111987 in words is "one hundred two billion, twenty million, one hundred eleven thousand, nine hundred eighty-seven".