121375616 has 16 divisors (see below), whose sum is σ = 241803240. Its totient is φ = 60687744.

The previous prime is 121375603. The next prime is 121375697. The reversal of 121375616 is 616573121.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473996 + ... + 474251.

Almost surely, 2^121375616 is an apocalyptic number.

121375616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121375616 is a deficient number, since it is larger than the sum of its proper divisors (120427624).

121375616 is an frugal number, since it uses more digits than its factorization.

121375616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948261 (or 948249 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 121375616 is about 11017.0602249420. The cubic root of 121375616 is about 495.1200144327.

The spelling of 121375616 in words is "one hundred twenty-one million, three hundred seventy-five thousand, six hundred sixteen".