120105005405 has 16 divisors (see below), whose sum is σ = 179689567104. Its totient is φ = 74870652480.

The previous prime is 120105005401. The next prime is 120105005479. The reversal of 120105005405 is 504500501021.

It is a happy number.

It is not a de Polignac number, because 120105005405 - 2² = 120105005401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120105005401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155980142 + ... + 155980911.

It is an arithmetic number, because the mean of its divisors is an integer number (11230597944).

Almost surely, 2^120105005405 is an apocalyptic number.

It is an amenable number.

120105005405 is a deficient number, since it is larger than the sum of its proper divisors (59584561699).

120105005405 is a wasteful number, since it uses less digits than its factorization.

120105005405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311961076.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 120105005405 its reverse (504500501021), we get a palindrome (624605506426).

The spelling of 120105005405 in words is "one hundred twenty billion, one hundred five million, five thousand, four hundred five".