120530351681 has 4 divisors (see below), whose sum is σ = 120565899264. Its totient is φ = 120494804100.

The previous prime is 120530351671. The next prime is 120530351729. The reversal of 120530351681 is 186153035021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120530351681 - 2²² = 120526157377 is a prime.

It is a super-2 number, since 2×120530351681² (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 (120530351621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17768705 + ... + 17775486.

It is an arithmetic number, because the mean of its divisors is an integer number (30141474816).

Almost surely, 2^120530351681 is an apocalyptic number.

It is an amenable number.

120530351681 is a deficient number, since it is larger than the sum of its proper divisors (35547583).

120530351681 is an equidigital number, since it uses as much as digits as its factorization.

120530351681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35547582.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 120530351681 in words is "one hundred twenty billion, five hundred thirty million, three hundred fifty-one thousand, six hundred eighty-one".