121311444 has 12 divisors (see below), whose sum is σ = 283060064. Its totient is φ = 40437144.

The previous prime is 121311433. The next prime is 121311451. The reversal of 121311444 is 444113121.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a self number, because there is not a number n which added to its sum of digits gives 121311444.

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 3 ways as a sum of consecutive naturals, for example, 5054632 + ... + 5054655.

Almost surely, 2^121311444 is an apocalyptic number.

It is an amenable number.

121311444 is an abundant number, since it is smaller than the sum of its proper divisors (161748620).

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

121311444 is a wasteful number, since it uses less digits than its factorization.

121311444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10109294 (or 10109292 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 121311444 is about 11014.1474477147. The cubic root of 121311444 is about 495.0327414319.

Adding to 121311444 its reverse (444113121), we get a palindrome (565424565).

The spelling of 121311444 in words is "one hundred twenty-one million, three hundred eleven thousand, four hundred forty-four".