121698720 has 384 divisors, whose sum is σ = 502951680. Its totient is φ = 27095040.

The previous prime is 121698713. The next prime is 121698737. The reversal of 121698720 is 27896121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 617662 + ... + 617858.

It is an arithmetic number, because the mean of its divisors is an integer number (1309770).

Almost surely, 2^121698720 is an apocalyptic number.

121698720 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 121698720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251475840).

121698720 is an abundant number, since it is smaller than the sum of its proper divisors (381252960).

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

121698720 is a wasteful number, since it uses less digits than its factorization.

121698720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 121698720 is about 11031.7142820144. The cubic root of 121698720 is about 495.5589645274.

The spelling of 121698720 in words is "one hundred twenty-one million, six hundred ninety-eight thousand, seven hundred twenty".