121651716 has 12 divisors (see below), whose sum is σ = 283854032. Its totient is φ = 40550568.

The previous prime is 121651679. The next prime is 121651759. The reversal of 121651716 is 617156121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5068810 + ... + 5068833.

Almost surely, 2^121651716 is an apocalyptic number.

It is an amenable number.

121651716 is an abundant number, since it is smaller than the sum of its proper divisors (162202316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121651716 is a wasteful number, since it uses less digits than its factorization.

121651716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10137650 (or 10137648 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 121651716 is about 11029.5836730132. The cubic root of 121651716 is about 495.4951559870.

The spelling of 121651716 in words is "one hundred twenty-one million, six hundred fifty-one thousand, seven hundred sixteen".