121016657 has 4 divisors (see below), whose sum is σ = 122191680. Its totient is φ = 119841636.

The previous prime is 121016647. The next prime is 121016669. The reversal of 121016657 is 756610121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756610121 = 1663 ⋅454967.

It is a cyclic number.

It is not a de Polignac number, because 121016657 - 2⁴ = 121016641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121016617) 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 3 ways as a sum of consecutive naturals, for example, 587357 + ... + 587562.

It is an arithmetic number, because the mean of its divisors is an integer number (30547920).

Almost surely, 2^121016657 is an apocalyptic number.

It is an amenable number.

121016657 is a deficient number, since it is larger than the sum of its proper divisors (1175023).

121016657 is a wasteful number, since it uses less digits than its factorization.

121016657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175022.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121016657 is about 11000.7571103084. The cubic root of 121016657 is about 494.6314394208.

Adding to 121016657 its reverse (756610121), we get a palindrome (877626778).

The spelling of 121016657 in words is "one hundred twenty-one million, sixteen thousand, six hundred fifty-seven".