121616516 has 24 divisors (see below), whose sum is σ = 243477696. Its totient is φ = 52068960.

The previous prime is 121616507. The next prime is 121616531. The reversal of 121616516 is 615616121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41450 + ... + 44286.

It is an arithmetic number, because the mean of its divisors is an integer number (10144904).

Almost surely, 2^121616516 is an apocalyptic number.

It is an amenable number.

121616516 is an abundant number, since it is smaller than the sum of its proper divisors (121861180).

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

121616516 is a wasteful number, since it uses less digits than its factorization.

121616516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379 (or 4377 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 121616516 is about 11027.9878491047. The cubic root of 121616516 is about 495.4473607659.

The spelling of 121616516 in words is "one hundred twenty-one million, six hundred sixteen thousand, five hundred sixteen".