121445668 has 6 divisors (see below), whose sum is σ = 212529926. Its totient is φ = 60722832.

The previous prime is 121445651. The next prime is 121445719. The reversal of 121445668 is 866544121.

It can be written as a sum of positive squares in only one way, i.e., 94633984 + 26811684 = 9728^2 + 5178^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15180705 + ... + 15180712.

Almost surely, 2^121445668 is an apocalyptic number.

It is an amenable number.

121445668 is a deficient number, since it is larger than the sum of its proper divisors (91084258).

121445668 is a wasteful number, since it uses less digits than its factorization.

121445668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30361421 (or 30361419 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 121445668 is about 11020.2390173716. The cubic root of 121445668 is about 495.2152490382.

Adding to 121445668 its reverse (866544121), we get a palindrome (987989789).

The spelling of 121445668 in words is "one hundred twenty-one million, four hundred forty-five thousand, six hundred sixty-eight".