121591080 has 96 divisors (see below), whose sum is σ = 425585160. Its totient is φ = 29928960.

The previous prime is 121591073. The next prime is 121591091. The reversal of 121591080 is 80195121.

It can be written as a sum of positive squares in 4 ways, for example, as 78110244 + 43480836 = 8838^2 + 6594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8311 + ... + 17670.

Almost surely, 2^121591080 is an apocalyptic number.

121591080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121591080 is an abundant number, since it is smaller than the sum of its proper divisors (303994080).

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

121591080 is a wasteful number, since it uses less digits than its factorization.

121591080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26011 (or 26004 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 121591080 is about 11026.8345412453. The cubic root of 121591080 is about 495.4128175471.

The spelling of 121591080 in words is "one hundred twenty-one million, five hundred ninety-one thousand, eighty".