121981700 has 36 divisors (see below), whose sum is σ = 269053092. Its totient is φ = 47990400.

The previous prime is 121981687. The next prime is 121981721. The reversal of 121981700 is 7189121.

It can be written as a sum of positive squares in 6 ways, for example, as 6677056 + 115304644 = 2584^2 + 10738^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3899 + ... + 16098.

It is an arithmetic number, because the mean of its divisors is an integer number (7473697).

Almost surely, 2^121981700 is an apocalyptic number.

121981700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121981700 is an abundant number, since it is smaller than the sum of its proper divisors (147071392).

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

121981700 is a wasteful number, since it uses less digits than its factorization.

121981700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20072 (or 20065 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 121981700 is about 11044.5325840436. The cubic root of 121981700 is about 495.9427667659.

The spelling of 121981700 in words is "one hundred twenty-one million, nine hundred eighty-one thousand, seven hundred".