121321444 has 12 divisors (see below), whose sum is σ = 212413824. Its totient is φ = 60631784.

The previous prime is 121321439. The next prime is 121321451. The reversal of 121321444 is 444123121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4209 + ... + 16135.

It is an arithmetic number, because the mean of its divisors is an integer number (17701152).

Almost surely, 2^121321444 is an apocalyptic number.

It is an amenable number.

121321444 is a deficient number, since it is larger than the sum of its proper divisors (91092380).

121321444 is a wasteful number, since it uses less digits than its factorization.

121321444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14474 (or 14472 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 121321444 is about 11014.6013999600. The cubic root of 121321444 is about 495.0463433127.

Adding to 121321444 its reverse (444123121), we get a palindrome (565444565).

The spelling of 121321444 in words is "one hundred twenty-one million, three hundred twenty-one thousand, four hundred forty-four".