121054909 has 8 divisors (see below), whose sum is σ = 134922240. Its totient is φ = 107937216.

The previous prime is 121054889. The next prime is 121054931. The reversal of 121054909 is 909450121.

121054909 = T₈₉₈₂ + T₈₉₈₃ + T₈₉₈₄.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121054909 - 2¹⁵ = 121022141 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121054949) 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 7 ways as a sum of consecutive naturals, for example, 187069 + ... + 187714.

It is an arithmetic number, because the mean of its divisors is an integer number (16865280).

Almost surely, 2^121054909 is an apocalyptic number.

121054909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121054909 is the 8984-th centered triangular number.

It is an amenable number.

121054909 is a deficient number, since it is larger than the sum of its proper divisors (13867331).

121054909 is a wasteful number, since it uses less digits than its factorization.

121054909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374819.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 121054909 is about 11002.4955805490. The cubic root of 121054909 is about 494.6835497366.

The spelling of 121054909 in words is "one hundred twenty-one million, fifty-four thousand, nine hundred nine".