121668007 has 4 divisors (see below), whose sum is σ = 124256736. Its totient is φ = 119079280.

The previous prime is 121667989. The next prime is 121668011. The reversal of 121668007 is 700866121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121668007 - 2⁷ = 121667879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121668007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121668067) 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 3 ways as a sum of consecutive naturals, for example, 1294294 + ... + 1294387.

It is an arithmetic number, because the mean of its divisors is an integer number (31064184).

Almost surely, 2^121668007 is an apocalyptic number.

121668007 is a deficient number, since it is larger than the sum of its proper divisors (2588729).

121668007 is an equidigital number, since it uses as much as digits as its factorization.

121668007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588728.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 121668007 is about 11030.3221621129. The cubic root of 121668007 is about 495.5172730918.

The spelling of 121668007 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, seven".