121153554441 has 16 divisors (see below), whose sum is σ = 190044792000. Its totient is φ = 76017916224.

The previous prime is 121153554433. The next prime is 121153554451. The reversal of 121153554441 is 144455351121.

121153554441 is a `hidden beast` number, since 1 + 2 + 11 + 53 + 554 + 4 + 41 = 666.

It is not a de Polignac number, because 121153554441 - 2³ = 121153554433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121153554396 and 121153554405.

It is not an unprimeable number, because it can be changed into a prime (121153554451) 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 15 ways as a sum of consecutive naturals, for example, 131975091 + ... + 131976008.

It is an arithmetic number, because the mean of its divisors is an integer number (11877799500).

Almost surely, 2^121153554441 is an apocalyptic number.

It is an amenable number.

121153554441 is a deficient number, since it is larger than the sum of its proper divisors (68891237559).

121153554441 is a wasteful number, since it uses less digits than its factorization.

121153554441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263951125 (or 263951119 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The spelling of 121153554441 in words is "one hundred twenty-one billion, one hundred fifty-three million, five hundred fifty-four thousand, four hundred forty-one".