121415668 has 24 divisors (see below), whose sum is σ = 232354080. Its totient is φ = 55055520.

The previous prime is 121415659. The next prime is 121415699. The reversal of 121415668 is 866514121.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16378 + ... + 22606.

It is an arithmetic number, because the mean of its divisors is an integer number (9681420).

Almost surely, 2^121415668 is an apocalyptic number.

It is an amenable number.

121415668 is a deficient number, since it is larger than the sum of its proper divisors (110938412).

121415668 is a wasteful number, since it uses less digits than its factorization.

121415668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687 (or 6685 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 121415668 is about 11018.8778013008. The cubic root of 121415668 is about 495.1744689891.

Adding to 121415668 its reverse (866514121), we get a palindrome (987929789).

The spelling of 121415668 in words is "one hundred twenty-one million, four hundred fifteen thousand, six hundred sixty-eight".