121668087 has 16 divisors (see below), whose sum is σ = 168026112. Its totient is φ = 78228960.

The previous prime is 121668083. The next prime is 121668097. The reversal of 121668087 is 780866121.

It is not a de Polignac number, because 121668087 - 2² = 121668083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121668083) 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 15 ways as a sum of consecutive naturals, for example, 27418 + ... + 31544.

It is an arithmetic number, because the mean of its divisors is an integer number (10501632).

Almost surely, 2^121668087 is an apocalyptic number.

121668087 is a deficient number, since it is larger than the sum of its proper divisors (46358025).

121668087 is a wasteful number, since it uses less digits than its factorization.

121668087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 121668087 is about 11030.3257884797. The cubic root of 121668087 is about 495.5173816971.

The spelling of 121668087 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, eighty-seven".