121808650 has 24 divisors (see below), whose sum is σ = 227267820. Its totient is φ = 48572160.

The previous prime is 121808633. The next prime is 121808653. The reversal of 121808650 is 56808121.

It can be written as a sum of positive squares in 6 ways, for example, as 73908409 + 47900241 = 8597^2 + 6921^2 .

It is not an unprimeable number, because it can be changed into a prime (121808653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13236 + ... + 20464.

Almost surely, 2^121808650 is an apocalyptic number.

121808650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121808650 is a deficient number, since it is larger than the sum of its proper divisors (105459170).

121808650 is a wasteful number, since it uses less digits than its factorization.

121808650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578 (or 7573 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 121808650 is about 11036.6956105530. The cubic root of 121808650 is about 495.7081318106.

The spelling of 121808650 in words is "one hundred twenty-one million, eight hundred eight thousand, six hundred fifty".