102011239987 has 2 divisors, whose sum is σ = 102011239988. Its totient is φ = 102011239986.

The previous prime is 102011239963. The next prime is 102011240011. The reversal of 102011239987 is 789932110201.

It is a balanced prime because it is at equal distance from previous prime (102011239963) and next prime (102011240011).

It is a cyclic number.

It is not a de Polignac number, because 102011239987 - 2¹⁵ = 102011207219 is a prime.

It is not a weakly prime, because it can be changed into another prime (102011239937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005619993 + 51005619994.

It is an arithmetic number, because the mean of its divisors is an integer number (51005619994).

Almost surely, 2^102011239987 is an apocalyptic number.

102011239987 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011239987 is an equidigital number, since it uses as much as digits as its factorization.

102011239987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 102011239987 in words is "one hundred two billion, eleven million, two hundred thirty-nine thousand, nine hundred eighty-seven".