120011656221 has 54 divisors (see below), whose sum is σ = 184707325530. Its totient is φ = 75077295552.

The previous prime is 120011656189. The next prime is 120011656223. The reversal of 120011656221 is 122656110021.

120011656221 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 1 + 1 + 656 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 19934333721 + 100077322500 = 141189^2 + 316350^2 .

It is not a de Polignac number, because 120011656221 - 2⁵ = 120011656189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011656223) 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 53 ways as a sum of consecutive naturals, for example, 38599815 + ... + 38602923.

Almost surely, 2^120011656221 is an apocalyptic number.

It is an amenable number.

120011656221 is a deficient number, since it is larger than the sum of its proper divisors (64695669309).

120011656221 is a wasteful number, since it uses less digits than its factorization.

120011656221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 120011656221 its reverse (122656110021), we get a palindrome (242667766242).

The spelling of 120011656221 in words is "one hundred twenty billion, eleven million, six hundred fifty-six thousand, two hundred twenty-one".