31121442444 has 12 divisors (see below), whose sum is σ = 72616699064. Its totient is φ = 10373814144.

The previous prime is 31121442419. The next prime is 31121442467. The reversal of 31121442444 is 44424412113.

It is a happy number.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1296726757 + ... + 1296726780.

Almost surely, 2^31121442444 is an apocalyptic number.

It is an amenable number.

31121442444 is an abundant number, since it is smaller than the sum of its proper divisors (41495256620).

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

31121442444 is a wasteful number, since it uses less digits than its factorization.

31121442444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593453544 (or 2593453542 counting only the distinct ones).

The product of its digits is 12288, while the sum is 30.

Adding to 31121442444 its reverse (44424412113), we get a palindrome (75545854557).

The spelling of 31121442444 in words is "thirty-one billion, one hundred twenty-one million, four hundred forty-two thousand, four hundred forty-four".