121808830 has 64 divisors (see below), whose sum is σ = 260402688. Its totient is φ = 40440960.

The previous prime is 121808803. The next prime is 121808833. The reversal of 121808830 is 38808121.

It is a junction number, because it is equal to n+sod(n) for n = 121808792 and 121808801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121808833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146877 + ... + 147703.

It is an arithmetic number, because the mean of its divisors is an integer number (4068792).

Almost surely, 2^121808830 is an apocalyptic number.

121808830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121808830 is an abundant number, since it is smaller than the sum of its proper divisors (138593858).

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

121808830 is a wasteful number, since it uses less digits than its factorization.

121808830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 121808830 is about 11036.7037651647. The cubic root of 121808830 is about 495.7083759843.

The spelling of 121808830 in words is "one hundred twenty-one million, eight hundred eight thousand, eight hundred thirty".