121975700 has 216 divisors, whose sum is σ = 351477504. Its totient is φ = 36288000.

The previous prime is 121975699. The next prime is 121975723. The reversal of 121975700 is 7579121.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1670864 + ... + 1670936.

Almost surely, 2^121975700 is an apocalyptic number.

121975700 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 121975700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175738752).

121975700 is an abundant number, since it is smaller than the sum of its proper divisors (229501804).

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

121975700 is a wasteful number, since it uses less digits than its factorization.

121975700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 121975700 is about 11044.2609530923. The cubic root of 121975700 is about 495.9346352036.

The spelling of 121975700 in words is "one hundred twenty-one million, nine hundred seventy-five thousand, seven hundred".