121651672 has 16 divisors (see below), whose sum is σ = 230356800. Its totient is φ = 60223200.

The previous prime is 121651667. The next prime is 121651679. The reversal of 121651672 is 276156121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121651679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74472 + ... + 76087.

It is an arithmetic number, because the mean of its divisors is an integer number (14397300).

Almost surely, 2^121651672 is an apocalyptic number.

It is an amenable number.

121651672 is a deficient number, since it is larger than the sum of its proper divisors (108705128).

121651672 is a wasteful number, since it uses less digits than its factorization.

121651672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150666 (or 150662 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 121651672 is about 11029.5816783775. The cubic root of 121651672 is about 495.4950962487.

The spelling of 121651672 in words is "one hundred twenty-one million, six hundred fifty-one thousand, six hundred seventy-two".