120771870761 has 4 divisors (see below), whose sum is σ = 120772737492. Its totient is φ = 120771004032.

The previous prime is 120771870749. The next prime is 120771870767. The reversal of 120771870761 is 167078177021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 78590515600 + 42181355161 = 280340^2 + 205381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120771870761 is a prime.

It is a super-2 number, since 2×120771870761² (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 (120771870767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171680 + ... + 520593.

It is an arithmetic number, because the mean of its divisors is an integer number (30193184373).

Almost surely, 2^120771870761 is an apocalyptic number.

It is an amenable number.

120771870761 is a deficient number, since it is larger than the sum of its proper divisors (866731).

120771870761 is an equidigital number, since it uses as much as digits as its factorization.

120771870761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866730.

The product of its (nonzero) digits is 230496, while the sum is 47.

The spelling of 120771870761 in words is "one hundred twenty billion, seven hundred seventy-one million, eight hundred seventy thousand, seven hundred sixty-one".