3121221332 has 12 divisors (see below), whose sum is σ = 5475495060. Its totient is φ = 1556794176.

The previous prime is 3121221287. The next prime is 3121221373. The reversal of 3121221332 is 2331221213.

It can be written as a sum of positive squares in 2 ways, for example, as 3034247056 + 86974276 = 55084^2 + 9326^2 .

It is a congruent number.

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, 952283 + ... + 955554.

It is an arithmetic number, because the mean of its divisors is an integer number (456291255).

Almost surely, 2^3121221332 is an apocalyptic number.

It is an amenable number.

3121221332 is a deficient number, since it is larger than the sum of its proper divisors (2354273728).

3121221332 is a wasteful number, since it uses less digits than its factorization.

3121221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908250 (or 1908248 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 3121221332 is about 55867.8917805209. The cubic root of 3121221332 is about 1461.4193571813.

Adding to 3121221332 its reverse (2331221213), we get a palindrome (5452442545).

The spelling of 3121221332 in words is "three billion, one hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty-two".