121166659 has 4 divisors (see below), whose sum is σ = 121463320. Its totient is φ = 120870000.

The previous prime is 121166653. The next prime is 121166663. The reversal of 121166659 is 956661121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956661121 = 13 ⋅73589317.

It is a cyclic number.

It is not a de Polignac number, because 121166659 - 2¹⁹ = 120642371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121166653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147717 + ... + 148534.

It is an arithmetic number, because the mean of its divisors is an integer number (30365830).

Almost surely, 2^121166659 is an apocalyptic number.

121166659 is a deficient number, since it is larger than the sum of its proper divisors (296661).

121166659 is an equidigital number, since it uses as much as digits as its factorization.

121166659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296660.

The product of its digits is 19440, while the sum is 37.

The square root of 121166659 is about 11007.5728023938. The cubic root of 121166659 is about 494.8357227885.

The spelling of 121166659 in words is "one hundred twenty-one million, one hundred sixty-six thousand, six hundred fifty-nine".