121555049 has 16 divisors (see below), whose sum is σ = 160465536. Its totient is φ = 89145600.

The previous prime is 121555013. The next prime is 121555073. The reversal of 121555049 is 940555121.

It is a cyclic number.

It is not a de Polignac number, because 121555049 - 2¹⁶ = 121489513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121555099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45122 + ... + 47739.

It is an arithmetic number, because the mean of its divisors is an integer number (10029096).

Almost surely, 2^121555049 is an apocalyptic number.

It is an amenable number.

121555049 is a deficient number, since it is larger than the sum of its proper divisors (38910487).

121555049 is a wasteful number, since it uses less digits than its factorization.

121555049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92896.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 121555049 is about 11025.2006330951. The cubic root of 121555049 is about 495.3638776010.

The spelling of 121555049 in words is "one hundred twenty-one million, five hundred fifty-five thousand, forty-nine".