121130440 has 64 divisors (see below), whose sum is σ = 294107760. Its totient is φ = 44728320.

The previous prime is 121130417. The next prime is 121130447. The reversal of 121130440 is 44031121.

It can be written as a sum of positive squares in 8 ways, for example, as 96943716 + 24186724 = 9846^2 + 4918^2 .

It is not an unprimeable number, because it can be changed into a prime (121130447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34360 + ... + 37720.

Almost surely, 2^121130440 is an apocalyptic number.

121130440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121130440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147053880).

121130440 is an abundant number, since it is smaller than the sum of its proper divisors (172977320).

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

121130440 is a wasteful number, since it uses less digits than its factorization.

121130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121130440 is about 11005.9274938553. The cubic root of 121130440 is about 494.7864126309.

Adding to 121130440 its reverse (44031121), we get a palindrome (165161561).

The spelling of 121130440 in words is "one hundred twenty-one million, one hundred thirty thousand, four hundred forty".