12121444 has 24 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 5903040.

The previous prime is 12121427. The next prime is 12121451. The reversal of 12121444 is 44412121.

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

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 7 ways as a sum of consecutive naturals, for example, 27909 + ... + 28339.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^12121444 is an apocalyptic number.

It is an amenable number.

12121444 is a deficient number, since it is larger than the sum of its proper divisors (9651356).

12121444 is a wasteful number, since it uses less digits than its factorization.

12121444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 601 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 12121444 is about 3481.5864200103. The cubic root of 12121444 is about 229.7125836428.

Adding to 12121444 its reverse (44412121), we get a palindrome (56533565).

The spelling of 12121444 in words is "twelve million, one hundred twenty-one thousand, four hundred forty-four".