100011219985 has 16 divisors (see below), whose sum is σ = 122135839056. Its totient is φ = 78606102528.

The previous prime is 100011219983. The next prime is 100011220019. The reversal of 100011219985 is 589912110001.

It can be written as a sum of positive squares in 8 ways, for example, as 18060134544 + 81951085441 = 134388^2 + 286271^2 .

It is a cyclic number.

It is not a de Polignac number, because 100011219985 - 2¹ = 100011219983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100011219983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686142 + ... + 819031.

It is an arithmetic number, because the mean of its divisors is an integer number (7633489941).

Almost surely, 2^100011219985 is an apocalyptic number.

It is an amenable number.

100011219985 is a deficient number, since it is larger than the sum of its proper divisors (22124619071).

100011219985 is a wasteful number, since it uses less digits than its factorization.

100011219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505412.

The product of its (nonzero) digits is 6480, while the sum is 37.

Adding to 100011219985 its reverse (589912110001), we get a palindrome (689923329986).

The spelling of 100011219985 in words is "one hundred billion, eleven million, two hundred nineteen thousand, nine hundred eighty-five".