121444428 has 96 divisors (see below), whose sum is σ = 348364800. Its totient is φ = 32152896.

The previous prime is 121444423. The next prime is 121444429. The reversal of 121444428 is 824444121.

It is a junction number, because it is equal to n+sod(n) for n = 121444395 and 121444404.

It is not an unprimeable number, because it can be changed into a prime (121444423) 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 31 ways as a sum of consecutive naturals, for example, 74203 + ... + 75821.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^121444428 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 121444428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174182400).

121444428 is an abundant number, since it is smaller than the sum of its proper divisors (226920372).

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

121444428 is a wasteful number, since it uses less digits than its factorization.

121444428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1697 counting only the distinct ones).

The product of its digits is 8192, while the sum is 30.

The square root of 121444428 is about 11020.1827571053. The cubic root of 121444428 is about 495.2135635959.

Adding to 121444428 its reverse (824444121), we get a palindrome (945888549).

The spelling of 121444428 in words is "one hundred twenty-one million, four hundred forty-four thousand, four hundred twenty-eight".