121440330 has 128 divisors (see below), whose sum is σ = 364953600. Its totient is φ = 28468800.

The previous prime is 121440329. The next prime is 121440359. The reversal of 121440330 is 33044121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91411 + ... + 92729.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^121440330 is an apocalyptic number.

121440330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121440330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182476800).

121440330 is an abundant number, since it is smaller than the sum of its proper divisors (243513270).

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

121440330 is a wasteful number, since it uses less digits than its factorization.

121440330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 121440330 is about 11019.9968239560. The cubic root of 121440330 is about 495.2079933994.

Adding to 121440330 its reverse (33044121), we get a palindrome (154484451).

The spelling of 121440330 in words is "one hundred twenty-one million, four hundred forty thousand, three hundred thirty".