121999360 has 208 divisors, whose sum is σ = 358569216. Its totient is φ = 38928384.

The previous prime is 121999333. The next prime is 121999363. The reversal of 121999360 is 63999121.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (121999363) 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, 3297262 + ... + 3297298.

Almost surely, 2^121999360 is an apocalyptic number.

121999360 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 121999360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179284608).

121999360 is an abundant number, since it is smaller than the sum of its proper divisors (236569856).

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

121999360 is an equidigital number, since it uses as much as digits as its factorization.

121999360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 121999360 is about 11045.3320457105. The cubic root of 121999360 is about 495.9666991170.

The spelling of 121999360 in words is "one hundred twenty-one million, nine hundred ninety-nine thousand, three hundred sixty".