121132320 has 48 divisors (see below), whose sum is σ = 381568320. Its totient is φ = 32301824.

The previous prime is 121132307. The next prime is 121132321. The reversal of 121132320 is 23231121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121132320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132321) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 125700 + ... + 126659.

It is an arithmetic number, because the mean of its divisors is an integer number (7949340).

Almost surely, 2^121132320 is an apocalyptic number.

121132320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121132320 is an abundant number, since it is smaller than the sum of its proper divisors (260436000).

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

121132320 is a wasteful number, since it uses less digits than its factorization.

121132320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252377 (or 252369 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121132320 is about 11006.0129020459. The cubic root of 121132320 is about 494.7889723884.

Adding to 121132320 its reverse (23231121), we get a palindrome (144363441).

The spelling of 121132320 in words is "one hundred twenty-one million, one hundred thirty-two thousand, three hundred twenty".