121424020 has 48 divisors (see below), whose sum is σ = 260084160. Its totient is φ = 47609856.

The previous prime is 121423999. The next prime is 121424021. The reversal of 121424020 is 20424121.

It is a junction number, because it is equal to n+sod(n) for n = 121423985 and 121424003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121424021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320191 + ... + 320569.

It is an arithmetic number, because the mean of its divisors is an integer number (5418420).

Almost surely, 2^121424020 is an apocalyptic number.

121424020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121424020 is an abundant number, since it is smaller than the sum of its proper divisors (138660140).

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

121424020 is a wasteful number, since it uses less digits than its factorization.

121424020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 121424020 is about 11019.2567807452. The cubic root of 121424020 is about 495.1858228294.

Adding to 121424020 its reverse (20424121), we get a palindrome (141848141).

The spelling of 121424020 in words is "one hundred twenty-one million, four hundred twenty-four thousand, twenty".