121381120 has 288 divisors, whose sum is σ = 376750080. Its totient is φ = 36495360.

The previous prime is 121381069. The next prime is 121381129. The reversal of 121381120 is 21183121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121381129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3915505 + ... + 3915535.

It is an arithmetic number, because the mean of its divisors is an integer number (1308160).

Almost surely, 2^121381120 is an apocalyptic number.

121381120 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 121381120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188375040).

121381120 is an abundant number, since it is smaller than the sum of its proper divisors (255368960).

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

121381120 is a wasteful number, since it uses less digits than its factorization.

121381120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 121381120 is about 11017.3100165149. The cubic root of 121381120 is about 495.1274983614.

The spelling of 121381120 in words is "one hundred twenty-one million, three hundred eighty-one thousand, one hundred twenty".