121939320 has 64 divisors (see below), whose sum is σ = 369476640. Its totient is φ = 32192000.

The previous prime is 121939319. The next prime is 121939327. The reversal of 121939320 is 23939121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121939327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7090 + ... + 17150.

Almost surely, 2^121939320 is an apocalyptic number.

121939320 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 121939320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184738320).

121939320 is an abundant number, since it is smaller than the sum of its proper divisors (247537320).

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

121939320 is a wasteful number, since it uses less digits than its factorization.

121939320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10176 (or 10172 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 121939320 is about 11042.6138210118. The cubic root of 121939320 is about 495.8853251195.

The spelling of 121939320 in words is "one hundred twenty-one million, nine hundred thirty-nine thousand, three hundred twenty".