3121523213 has 2 divisors, whose sum is σ = 3121523214. Its totient is φ = 3121523212.

The previous prime is 3121523191. The next prime is 3121523227. The reversal of 3121523213 is 3123251213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3119557609 + 1965604 = 55853^2 + 1402^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121523213 - 2⁶ = 3121523149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121523113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560761606 + 1560761607.

It is an arithmetic number, because the mean of its divisors is an integer number (1560761607).

Almost surely, 2^3121523213 is an apocalyptic number.

It is an amenable number.

3121523213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121523213 is an equidigital number, since it uses as much as digits as its factorization.

3121523213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 3121523213 is about 55870.5934548757. The cubic root of 3121523213 is about 1461.4664712720.

Adding to 3121523213 its reverse (3123251213), we get a palindrome (6244774426).

Subtracting 3121523213 from its reverse (3123251213), we obtain a cube (1728000 = 120³).

The spelling of 3121523213 in words is "three billion, one hundred twenty-one million, five hundred twenty-three thousand, two hundred thirteen".