121305650 has 12 divisors (see below), whose sum is σ = 225628602. Its totient is φ = 48522240.

The previous prime is 121305649. The next prime is 121305661. The reversal of 121305650 is 56503121.

It can be written as a sum of positive squares in 3 ways, for example, as 79405921 + 41899729 = 8911^2 + 6473^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213007 + ... + 1213106.

Almost surely, 2^121305650 is an apocalyptic number.

121305650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121305650 is a deficient number, since it is larger than the sum of its proper divisors (104322952).

121305650 is a wasteful number, since it uses less digits than its factorization.

121305650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426125 (or 2426120 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 121305650 is about 11013.8844192229. The cubic root of 121305650 is about 495.0248601601.

Adding to 121305650 its reverse (56503121), we get a palindrome (177808771).

The spelling of 121305650 in words is "one hundred twenty-one million, three hundred five thousand, six hundred fifty".