121315444 has 24 divisors (see below), whose sum is σ = 215268480. Its totient is φ = 59816064.

The previous prime is 121315421. The next prime is 121315459. The reversal of 121315444 is 444513121.

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, 107467 + ... + 108589.

It is an arithmetic number, because the mean of its divisors is an integer number (8969520).

Almost surely, 2^121315444 is an apocalyptic number.

It is an amenable number.

121315444 is a deficient number, since it is larger than the sum of its proper divisors (93953036).

121315444 is a wasteful number, since it uses less digits than its factorization.

121315444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1477 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 121315444 is about 11014.3290308579. The cubic root of 121315444 is about 495.0381822739.

Adding to 121315444 its reverse (444513121), we get a palindrome (565828565).

The spelling of 121315444 in words is "one hundred twenty-one million, three hundred fifteen thousand, four hundred forty-four".