100000990100 has 36 divisors (see below), whose sum is σ = 236729619168. Its totient is φ = 36363996000.

The previous prime is 100000990093. The next prime is 100000990129. The reversal of 100000990100 is 1099000001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45453896 + ... + 45456095.

Almost surely, 2^100000990100 is an apocalyptic number.

100000990100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100000990100 is an abundant number, since it is smaller than the sum of its proper divisors (136728629068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100000990100 is a wasteful number, since it uses less digits than its factorization.

100000990100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90910016 (or 90910009 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 20.

Adding to 100000990100 its reverse (1099000001), we get a palindrome (101099990101).

The spelling of 100000990100 in words is "one hundred billion, nine hundred ninety thousand, one hundred".