121005057 has 8 divisors (see below), whose sum is σ = 161499520. Its totient is φ = 80590320.

The previous prime is 121005043. The next prime is 121005089. The reversal of 121005057 is 750500121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121005057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121005097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294 + ... + 22527.

It is an arithmetic number, because the mean of its divisors is an integer number (20187440).

Almost surely, 2^121005057 is an apocalyptic number.

It is an amenable number.

121005057 is a deficient number, since it is larger than the sum of its proper divisors (40494463).

121005057 is a wasteful number, since it uses less digits than its factorization.

121005057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39863.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 121005057 is about 11000.2298612347. The cubic root of 121005057 is about 494.6156346873.

Adding to 121005057 its reverse (750500121), we get a palindrome (871505178).

The spelling of 121005057 in words is "one hundred twenty-one million, five thousand, fifty-seven".