121947512 has 8 divisors (see below), whose sum is σ = 228651600. Its totient is φ = 60973752.

The previous prime is 121947503. The next prime is 121947517. The reversal of 121947512 is 215749121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121947517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621712 + ... + 7621727.

It is an arithmetic number, because the mean of its divisors is an integer number (28581450).

Almost surely, 2^121947512 is an apocalyptic number.

It is an amenable number.

121947512 is a deficient number, since it is larger than the sum of its proper divisors (106704088).

121947512 is a wasteful number, since it uses less digits than its factorization.

121947512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243445 (or 15243441 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 121947512 is about 11042.9847414546. The cubic root of 121947512 is about 495.8964295541.

The spelling of 121947512 in words is "one hundred twenty-one million, nine hundred forty-seven thousand, five hundred twelve".