3121040212 has 12 divisors (see below), whose sum is σ = 5595035796. Its totient is φ = 1522458560.

The previous prime is 3121040179. The next prime is 3121040213. The reversal of 3121040212 is 2120401213.

It can be written as a sum of positive squares in 2 ways, for example, as 328551876 + 2792488336 = 18126^2 + 52844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121040213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9515203 + ... + 9515530.

It is an arithmetic number, because the mean of its divisors is an integer number (466252983).

Almost surely, 2^3121040212 is an apocalyptic number.

It is an amenable number.

3121040212 is a deficient number, since it is larger than the sum of its proper divisors (2473995584).

3121040212 is a wasteful number, since it uses less digits than its factorization.

3121040212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19030778 (or 19030776 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3121040212 is about 55866.2707901646. The cubic root of 3121040212 is about 1461.3910886110.

Adding to 3121040212 its reverse (2120401213), we get a palindrome (5241441425).

The spelling of 3121040212 in words is "three billion, one hundred twenty-one million, forty thousand, two hundred twelve".