120843193945 has 4 divisors (see below), whose sum is σ = 145011832740. Its totient is φ = 96674555152.

The previous prime is 120843193943. The next prime is 120843193951. The reversal of 120843193945 is 549391348021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549391348021 = 73 ⋅7525908877.

It can be written as a sum of positive squares in 2 ways, for example, as 77485959769 + 43357234176 = 278363^2 + 208224^2 .

It is a cyclic number.

It is not a de Polignac number, because 120843193945 - 2¹ = 120843193943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120843193943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12084319390 + ... + 12084319399.

It is an arithmetic number, because the mean of its divisors is an integer number (36252958185).

Almost surely, 2^120843193945 is an apocalyptic number.

It is an amenable number.

120843193945 is a deficient number, since it is larger than the sum of its proper divisors (24168638795).

120843193945 is an equidigital number, since it uses as much as digits as its factorization.

120843193945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24168638794.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 120843193945 in words is "one hundred twenty billion, eight hundred forty-three million, one hundred ninety-three thousand, nine hundred forty-five".