121017849 has 16 divisors (see below), whose sum is σ = 171081792. Its totient is φ = 75829248.

The previous prime is 121017833. The next prime is 121017857. The reversal of 121017849 is 948710121.

It is not a de Polignac number, because 121017849 - 2⁴ = 121017833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121017349) 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 15 ways as a sum of consecutive naturals, for example, 56217 + ... + 58329.

It is an arithmetic number, because the mean of its divisors is an integer number (10692612).

Almost surely, 2^121017849 is an apocalyptic number.

It is an amenable number.

121017849 is a deficient number, since it is larger than the sum of its proper divisors (50063943).

121017849 is a wasteful number, since it uses less digits than its factorization.

121017849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 121017849 is about 11000.8112882642. The cubic root of 121017849 is about 494.6330634362.

The spelling of 121017849 in words is "one hundred twenty-one million, seventeen thousand, eight hundred forty-nine".