121975016 has 8 divisors (see below), whose sum is σ = 228703170. Its totient is φ = 60987504.

The previous prime is 121975013. The next prime is 121975037. The reversal of 121975016 is 610579121.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 3818116 = 10870^2 + 1954^2 .

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 (121975013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7623431 + ... + 7623446.

Almost surely, 2^121975016 is an apocalyptic number.

It is an amenable number.

121975016 is a deficient number, since it is larger than the sum of its proper divisors (106728154).

121975016 is a wasteful number, since it uses less digits than its factorization.

121975016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246883 (or 15246879 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 121975016 is about 11044.2299867397. The cubic root of 121975016 is about 495.9337081885.

The spelling of 121975016 in words is "one hundred twenty-one million, nine hundred seventy-five thousand, sixteen".