121600650 has 24 divisors (see below), whose sum is σ = 301569984. Its totient is φ = 32426800.

The previous prime is 121600649. The next prime is 121600651. The reversal of 121600650 is 56006121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121600649) and next prime (121600651).

It is not an unprimeable number, because it can be changed into a prime (121600651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405186 + ... + 405485.

It is an arithmetic number, because the mean of its divisors is an integer number (12565416).

Almost surely, 2^121600650 is an apocalyptic number.

121600650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121600650 is an abundant number, since it is smaller than the sum of its proper divisors (179969334).

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

121600650 is a wasteful number, since it uses less digits than its factorization.

121600650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810686 (or 810681 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 121600650 is about 11027.2684741055. The cubic root of 121600650 is about 495.4258145978.

Adding to 121600650 its reverse (56006121), we get a palindrome (177606771).

The spelling of 121600650 in words is "one hundred twenty-one million, six hundred thousand, six hundred fifty".