121440000 has 360 divisors, whose sum is σ = 459752832. Its totient is φ = 28160000.

The previous prime is 121439999. The next prime is 121440029. The reversal of 121440000 is 44121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 5279989 + ... + 5280011.

Almost surely, 2^121440000 is an apocalyptic number.

121440000 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 121440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229876416).

121440000 is an abundant number, since it is smaller than the sum of its proper divisors (338312832).

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

121440000 is an equidigital number, since it uses as much as digits as its factorization.

121440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121440000 is about 11019.9818511647. The cubic root of 121440000 is about 495.2075448422.

Adding to 121440000 its reverse (44121), we get a palindrome (121484121).

It can be divided in two parts, 1214 and 40000, that added together give a palindrome (41214).

The spelling of 121440000 in words is "one hundred twenty-one million, four hundred forty thousand".