100012019985 has 48 divisors (see below), whose sum is σ = 184304450304. Its totient is φ = 50057943936.

The previous prime is 100012019981. The next prime is 100012020007. The reversal of 100012019985 is 589910210001.

It is not a de Polignac number, because 100012019985 - 2² = 100012019981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100012019981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 856749 + ... + 966458.

It is an arithmetic number, because the mean of its divisors is an integer number (3839676048).

Almost surely, 2^100012019985 is an apocalyptic number.

100012019985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100012019985 is a deficient number, since it is larger than the sum of its proper divisors (84292430319).

100012019985 is a wasteful number, since it uses less digits than its factorization.

100012019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823294 (or 1823291 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

Adding to 100012019985 its reverse (589910210001), we get a palindrome (689922229986).

The spelling of 100012019985 in words is "one hundred billion, twelve million, nineteen thousand, nine hundred eighty-five".