121807650 has 24 divisors (see below), whose sum is σ = 302083344. Its totient is φ = 32482000.

The previous prime is 121807633. The next prime is 121807657. The reversal of 121807650 is 56708121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121807657) by changing a digit.

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, 405876 + ... + 406175.

It is an arithmetic number, because the mean of its divisors is an integer number (12586806).

Almost surely, 2^121807650 is an apocalyptic number.

121807650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121807650 is an abundant number, since it is smaller than the sum of its proper divisors (180275694).

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

121807650 is a wasteful number, since it uses less digits than its factorization.

121807650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812066 (or 812061 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 121807650 is about 11036.6503070452. The cubic root of 121807650 is about 495.7067752855.

The spelling of 121807650 in words is "one hundred twenty-one million, eight hundred seven thousand, six hundred fifty".