121795650 has 240 divisors, whose sum is σ = 376750440. Its totient is φ = 29030400.

The previous prime is 121795627. The next prime is 121795669. The reversal of 121795650 is 56597121.

121795650 is a `hidden beast` number, since 1 + 21 + 79 + 565 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 1432809 + 120362841 = 1197^2 + 10971^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 119 ways as a sum of consecutive naturals, for example, 1996620 + ... + 1996680.

Almost surely, 2^121795650 is an apocalyptic number.

121795650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121795650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188375220).

121795650 is an abundant number, since it is smaller than the sum of its proper divisors (254954790).

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

121795650 is a wasteful number, since it uses less digits than its factorization.

121795650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 121795650 is about 11036.1066504452. The cubic root of 121795650 is about 495.6904964046.

The spelling of 121795650 in words is "one hundred twenty-one million, seven hundred ninety-five thousand, six hundred fifty".