121700320 has 216 divisors, whose sum is σ = 361197144. Its totient is φ = 38610432.

The previous prime is 121700317. The next prime is 121700321. The reversal of 121700320 is 23007121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121700294 and 121700303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121700321) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2830219 + ... + 2830261.

It is an arithmetic number, because the mean of its divisors is an integer number (1672209).

Almost surely, 2^121700320 is an apocalyptic number.

121700320 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 121700320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180598572).

121700320 is an abundant number, since it is smaller than the sum of its proper divisors (239496824).

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

121700320 is a wasteful number, since it uses less digits than its factorization.

121700320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 121700320 is about 11031.7867999703. The cubic root of 121700320 is about 495.5611362590.

Adding to 121700320 its reverse (23007121), we get a palindrome (144707441).

The spelling of 121700320 in words is "one hundred twenty-one million, seven hundred thousand, three hundred twenty".