120478918981 has 4 divisors (see below), whose sum is σ = 120479613292. Its totient is φ = 120478224672.

The previous prime is 120478918951. The next prime is 120478919089. The reversal of 120478918981 is 189819874021.

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 102245818081 + 18233100900 = 319759^2 + 135030^2 .

It is a cyclic number.

It is not a de Polignac number, because 120478918981 - 2⁷ = 120478918853 is a prime.

It is a super-2 number, since 2×120478918981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120478918951) 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, 164371 + ... + 517663.

It is an arithmetic number, because the mean of its divisors is an integer number (30119903323).

Almost surely, 2^120478918981 is an apocalyptic number.

It is an amenable number.

120478918981 is a deficient number, since it is larger than the sum of its proper divisors (694311).

120478918981 is an equidigital number, since it uses as much as digits as its factorization.

120478918981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694310.

The product of its (nonzero) digits is 2322432, while the sum is 58.

The spelling of 120478918981 in words is "one hundred twenty billion, four hundred seventy-eight million, nine hundred eighteen thousand, nine hundred eighty-one".