100999111999 has 4 divisors (see below), whose sum is σ = 101000817280. Its totient is φ = 100997406720.

The previous prime is 100999111991. The next prime is 100999112017. The reversal of 100999111999 is 999111999001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100999111999 - 2³ = 100999111991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100999111991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760479 + ... + 883360.

It is an arithmetic number, because the mean of its divisors is an integer number (25250204320).

Almost surely, 2^100999111999 is an apocalyptic number.

100999111999 is a deficient number, since it is larger than the sum of its proper divisors (1705281).

100999111999 is an equidigital number, since it uses as much as digits as its factorization.

100999111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705280.

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 100999111999 in words is "one hundred billion, nine hundred ninety-nine million, one hundred eleven thousand, nine hundred ninety-nine".