121442424 has 48 divisors (see below), whose sum is σ = 322534200. Its totient is φ = 38097408.

The previous prime is 121442389. The next prime is 121442437. The reversal of 121442424 is 424244121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121442394 and 121442403.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1819 + ... + 15690.

Almost surely, 2^121442424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121442424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161267100).

121442424 is an abundant number, since it is smaller than the sum of its proper divisors (201091776).

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

121442424 is a wasteful number, since it uses less digits than its factorization.

121442424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17552 (or 17531 counting only the distinct ones).

The product of its digits is 2048, while the sum is 24.

The square root of 121442424 is about 11020.0918326482. The cubic root of 121442424 is about 495.2108396795.

Adding to 121442424 its reverse (424244121), we get a palindrome (545686545).

The spelling of 121442424 in words is "one hundred twenty-one million, four hundred forty-two thousand, four hundred twenty-four".