121975308 has 216 divisors, whose sum is σ = 402594192. Its totient is φ = 32006016.

The previous prime is 121975303. The next prime is 121975327. The reversal of 121975308 is 803579121.

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

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (121975303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 619066 + ... + 619262.

It is an arithmetic number, because the mean of its divisors is an integer number (1863862).

Almost surely, 2^121975308 is an apocalyptic number.

121975308 is a gapful number since it is divisible by the number (18) 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 121975308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201297096).

121975308 is an abundant number, since it is smaller than the sum of its proper divisors (280618884).

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

121975308 is a wasteful number, since it uses less digits than its factorization.

121975308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 121975308 is about 11044.2432063044. The cubic root of 121975308 is about 495.9341039322.

The spelling of 121975308 in words is "one hundred twenty-one million, nine hundred seventy-five thousand, three hundred eight".