121013440 has 28 divisors (see below), whose sum is σ = 288164016. Its totient is φ = 48405248.

The previous prime is 121013437. The next prime is 121013441. The reversal of 121013440 is 44310121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (121013441) 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 3 ways as a sum of consecutive naturals, for example, 188764 + ... + 189403.

It is an arithmetic number, because the mean of its divisors is an integer number (10291572).

Almost surely, 2^121013440 is an apocalyptic number.

121013440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121013440 is an abundant number, since it is smaller than the sum of its proper divisors (167150576).

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

121013440 is an equidigital number, since it uses as much as digits as its factorization.

121013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378184 (or 378174 counting only the distinct ones).

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

The square root of 121013440 is about 11000.6108921278. The cubic root of 121013440 is about 494.6270564335.

Adding to 121013440 its reverse (44310121), we get a palindrome (165323561).

The spelling of 121013440 in words is "one hundred twenty-one million, thirteen thousand, four hundred forty".