120551109905 has 8 divisors (see below), whose sum is σ = 144990859200. Its totient is φ = 96221203056.

The previous prime is 120551109901. The next prime is 120551109907. The reversal of 120551109905 is 509901155021.

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

It is a cyclic number.

It is not a de Polignac number, because 120551109905 - 2² = 120551109901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120551109901) 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, 27458195 + ... + 27462584.

It is an arithmetic number, because the mean of its divisors is an integer number (18123857400).

Almost surely, 2^120551109905 is an apocalyptic number.

It is an amenable number.

120551109905 is a deficient number, since it is larger than the sum of its proper divisors (24439749295).

120551109905 is an equidigital number, since it uses as much as digits as its factorization.

120551109905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54921223.

The product of its (nonzero) digits is 20250, while the sum is 38.

The spelling of 120551109905 in words is "one hundred twenty billion, five hundred fifty-one million, one hundred nine thousand, nine hundred five".