3121221444 has 24 divisors (see below), whose sum is σ = 7944927648. Its totient is φ = 945824640.

The previous prime is 3121221443. The next prime is 3121221451. The reversal of 3121221444 is 4441221213.

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

It is not an unprimeable number, because it can be changed into a prime (3121221443) by changing a digit.

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, 11822677 + ... + 11822940.

It is an arithmetic number, because the mean of its divisors is an integer number (331038652).

Almost surely, 2^3121221444 is an apocalyptic number.

It is an amenable number.

3121221444 is an abundant number, since it is smaller than the sum of its proper divisors (4823706204).

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

3121221444 is a wasteful number, since it uses less digits than its factorization.

3121221444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23645635 (or 23645633 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 3121221444 is about 55867.8927828856. The cubic root of 3121221444 is about 1461.4193746615.

Adding to 3121221444 its reverse (4441221213), we get a palindrome (7562442657).

The spelling of 3121221444 in words is "three billion, one hundred twenty-one million, two hundred twenty-one thousand, four hundred forty-four".