121512008 has 8 divisors (see below), whose sum is σ = 227835030. Its totient is φ = 60756000.

The previous prime is 121512007. The next prime is 121512029. The reversal of 121512008 is 800215121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89453764 + 32058244 = 9458^2 + 5662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (121512007) 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 as a sum of consecutive naturals, namely, 7594493 + ... + 7594508.

Almost surely, 2^121512008 is an apocalyptic number.

It is an amenable number.

121512008 is a deficient number, since it is larger than the sum of its proper divisors (106323022).

121512008 is a wasteful number, since it uses less digits than its factorization.

121512008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15189007 (or 15189003 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 121512008 is about 11023.2485230081. The cubic root of 121512008 is about 495.3054034808.

Adding to 121512008 its reverse (800215121), we get a palindrome (921727129).

The spelling of 121512008 in words is "one hundred twenty-one million, five hundred twelve thousand, eight".