121580016 has 40 divisors (see below), whose sum is σ = 324217344. Its totient is φ = 39218880.

The previous prime is 121580003. The next prime is 121580033. The reversal of 121580016 is 610085121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 39366 + ... + 42341.

Almost surely, 2^121580016 is an apocalyptic number.

121580016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121580016 is an abundant number, since it is smaller than the sum of its proper divisors (202637328).

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

121580016 is a wasteful number, since it uses less digits than its factorization.

121580016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81749 (or 81743 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 121580016 is about 11026.3328446043. The cubic root of 121580016 is about 495.3977906398.

The spelling of 121580016 in words is "one hundred twenty-one million, five hundred eighty thousand, sixteen".