121411440 has 80 divisors (see below), whose sum is σ = 418202400. Its totient is φ = 32375808.

The previous prime is 121411421. The next prime is 121411441. The reversal of 121411440 is 44114121.

121411440 is a `hidden beast` number, since 1 + 214 + 11 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121411441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25945 + ... + 30264.

It is an arithmetic number, because the mean of its divisors is an integer number (5227530).

Almost surely, 2^121411440 is an apocalyptic number.

121411440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121411440 is an abundant number, since it is smaller than the sum of its proper divisors (296790960).

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

121411440 is a wasteful number, since it uses less digits than its factorization.

121411440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56231 (or 56219 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 121411440 is about 11018.6859470628. The cubic root of 121411440 is about 495.1687211808.

Adding to 121411440 its reverse (44114121), we get a palindrome (165525561).

The spelling of 121411440 in words is "one hundred twenty-one million, four hundred eleven thousand, four hundred forty".