109920891101 has 4 divisors (see below), whose sum is σ = 125623875552. Its totient is φ = 94217906652.

The previous prime is 109920891089. The next prime is 109920891103. The reversal of 109920891101 is 101198029901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109920891101 - 2²² = 109916696797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109920891103) 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, 7851492215 + ... + 7851492228.

It is an arithmetic number, because the mean of its divisors is an integer number (31405968888).

Almost surely, 2^109920891101 is an apocalyptic number.

It is an amenable number.

109920891101 is a deficient number, since it is larger than the sum of its proper divisors (15702984451).

109920891101 is an equidigital number, since it uses as much as digits as its factorization.

109920891101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15702984450.

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 109920891101 in words is "one hundred nine billion, nine hundred twenty million, eight hundred ninety-one thousand, one hundred one".