109019756123 has 4 divisors (see below), whose sum is σ = 109021312560. Its totient is φ = 109018199688.

The previous prime is 109019756101. The next prime is 109019756213. The reversal of 109019756123 is 321657910901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109019756123 - 2¹⁰ = 109019755099 is a prime.

It is a super-2 number, since 2×109019756123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109019756023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667943 + ... + 814976.

It is an arithmetic number, because the mean of its divisors is an integer number (27255328140).

Almost surely, 2^109019756123 is an apocalyptic number.

109019756123 is a deficient number, since it is larger than the sum of its proper divisors (1556437).

109019756123 is an equidigital number, since it uses as much as digits as its factorization.

109019756123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556436.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 109019756123 in words is "one hundred nine billion, nineteen million, seven hundred fifty-six thousand, one hundred twenty-three".