121443320 has 32 divisors (see below), whose sum is σ = 274680720. Its totient is φ = 48322560.

The previous prime is 121443319. The next prime is 121443341. The reversal of 121443320 is 23344121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121443292 and 121443301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 15585.

Almost surely, 2^121443320 is an apocalyptic number.

121443320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121443320 is an abundant number, since it is smaller than the sum of its proper divisors (153237400).

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

121443320 is a wasteful number, since it uses less digits than its factorization.

121443320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15935 (or 15931 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 121443320 is about 11020.1324855920. The cubic root of 121443320 is about 495.2120575620.

Adding to 121443320 its reverse (23344121), we get a palindrome (144787441).

The spelling of 121443320 in words is "one hundred twenty-one million, four hundred forty-three thousand, three hundred twenty".