10500109987 has 2 divisors, whose sum is σ = 10500109988. Its totient is φ = 10500109986.

The previous prime is 10500109927. The next prime is 10500110021. The reversal of 10500109987 is 78990100501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10500109987 - 2¹⁹ = 10499585699 is a prime.

It is a super-2 number, since 2×10500109987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10500109927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250054993 + 5250054994.

It is an arithmetic number, because the mean of its divisors is an integer number (5250054994).

Almost surely, 2^10500109987 is an apocalyptic number.

10500109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10500109987 is an equidigital number, since it uses as much as digits as its factorization.

10500109987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 10500109987 in words is "ten billion, five hundred million, one hundred nine thousand, nine hundred eighty-seven".