120901548681 has 9 divisors (see below), whose sum is σ = 174637077069. Its totient is φ = 80600337036.

The previous prime is 120901548673. The next prime is 120901548721. The reversal of 120901548681 is 186845109021.

It is a happy number.

The square root of 120901548681 is 347709.

It is a perfect power (a square), and thus also a powerful number.

120901548681 is a `hidden beast` number, since 1 + 2 + 0 + 90 + 1 + 5 + 486 + 81 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 120901548681 - 2³ = 120901548673 is a prime.

It is a super-2 number, since 2×120901548681² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120901548611) 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 8 ways as a sum of consecutive naturals, for example, 985176 + ... + 1101078.

Almost surely, 2^120901548681 is an apocalyptic number.

120901548681 is the 347709-th square number.

120901548681 is the 173855-th centered octagonal number.

It is an amenable number.

120901548681 is a deficient number, since it is larger than the sum of its proper divisors (53735528388).

120901548681 is an frugal number, since it uses more digits than its factorization.

120901548681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231812 (or 115906 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 120901548681 in words is "one hundred twenty billion, nine hundred one million, five hundred forty-eight thousand, six hundred eighty-one".