109121111 has 8 divisors (see below), whose sum is σ = 119451024. Its totient is φ = 98859520.

The previous prime is 109121093. The next prime is 109121119. The reversal of 109121111 is 111121901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109121111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109121119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13706 + ... + 20151.

It is an arithmetic number, because the mean of its divisors is an integer number (14931378).

Almost surely, 2^109121111 is an apocalyptic number.

109121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

109121111 is a deficient number, since it is larger than the sum of its proper divisors (10329913).

109121111 is a wasteful number, since it uses less digits than its factorization.

109121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34161.

The product of its (nonzero) digits is 18, while the sum is 17.

The square root of 109121111 is about 10446.1050636110. The cubic root of 109121111 is about 477.8624730549.

The spelling of 109121111 in words is "one hundred nine million, one hundred twenty-one thousand, one hundred eleven".