100100091920 has 40 divisors (see below), whose sum is σ = 232754138496. Its totient is φ = 40036350848.

The previous prime is 100100091881. The next prime is 100100092049. The reversal of 100100091920 is 29190001001.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919919 + ... + 1022961.

Almost surely, 2^100100091920 is an apocalyptic number.

100100091920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100100091920 is an abundant number, since it is smaller than the sum of its proper divisors (132654046576).

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

100100091920 is a wasteful number, since it uses less digits than its factorization.

100100091920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115199 (or 115193 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

Adding to 100100091920 its reverse (29190001001), we get a palindrome (129290092921).

The spelling of 100100091920 in words is "one hundred billion, one hundred million, ninety-one thousand, nine hundred twenty".