121320440 has 16 divisors (see below), whose sum is σ = 272971080. Its totient is φ = 48528160.

The previous prime is 121320403. The next prime is 121320481. The reversal of 121320440 is 44023121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516466 + ... + 1516545.

Almost surely, 2^121320440 is an apocalyptic number.

121320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121320440 is an abundant number, since it is smaller than the sum of its proper divisors (151650640).

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

121320440 is a wasteful number, since it uses less digits than its factorization.

121320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033022 (or 3033018 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121320440 is about 11014.5558239994. Note that the first 3 decimals coincide. The cubic root of 121320440 is about 495.0449777176.

Adding to 121320440 its reverse (44023121), we get a palindrome (165343561).

The spelling of 121320440 in words is "one hundred twenty-one million, three hundred twenty thousand, four hundred forty".