121344240 has 40 divisors (see below), whose sum is σ = 376167888. Its totient is φ = 32358400.

The previous prime is 121344229. The next prime is 121344247. The reversal of 121344240 is 42443121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121344247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252561 + ... + 253040.

Almost surely, 2^121344240 is an apocalyptic number.

121344240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121344240 is an abundant number, since it is smaller than the sum of its proper divisors (254823648).

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

121344240 is a wasteful number, since it uses less digits than its factorization.

121344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505617 (or 505611 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 121344240 is about 11015.6361595688. The cubic root of 121344240 is about 495.0773473664.

Adding to 121344240 its reverse (42443121), we get a palindrome (163787361).

The spelling of 121344240 in words is "one hundred twenty-one million, three hundred forty-four thousand, two hundred forty".