109191100100 has 18 divisors (see below), whose sum is σ = 236944687434. Its totient is φ = 43676440000.

The previous prime is 109191100093. The next prime is 109191100111. The reversal of 109191100100 is 1001191901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7690237636 + 101500862464 = 87694^2 + 318592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 545955401 + ... + 545955600.

Almost surely, 2^109191100100 is an apocalyptic number.

109191100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109191100100 is an abundant number, since it is smaller than the sum of its proper divisors (127753587334).

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

109191100100 is a wasteful number, since it uses less digits than its factorization.

109191100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091911015 (or 1091911008 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 109191100100 in words is "one hundred nine billion, one hundred ninety-one million, one hundred thousand, one hundred".