121680320 has 28 divisors (see below), whose sum is σ = 289752024. Its totient is φ = 48672000.

The previous prime is 121680319. The next prime is 121680323. The reversal of 121680320 is 23086121.

It is a super-2 number, since 2×121680320² = 29612200550604800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121680323) 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, 189806 + ... + 190445.

Almost surely, 2^121680320 is an apocalyptic number.

121680320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121680320 is an abundant number, since it is smaller than the sum of its proper divisors (168071704).

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

121680320 is an equidigital number, since it uses as much as digits as its factorization.

121680320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380268 (or 380258 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121680320 is about 11030.8802912551. The cubic root of 121680320 is about 495.5339882457.

It can be divided in two parts, 121680 and 320, that multiplied together give a square (38937600 = 6240²).

The spelling of 121680320 in words is "one hundred twenty-one million, six hundred eighty thousand, three hundred twenty".