3121151213 has 2 divisors, whose sum is σ = 3121151214. Its totient is φ = 3121151212.

The previous prime is 3121151123. The next prime is 3121151219. The reversal of 3121151213 is 3121511213.

Together with previous prime (3121151123) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2779714729 + 341436484 = 52723^2 + 18478^2 .

It is an emirp because it is prime and its reverse (3121511213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121151213 - 2¹⁰ = 3121150189 is a prime.

It is a super-2 number, since 2×3121151213² = 19483169788822742738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121151219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560575606 + 1560575607.

It is an arithmetic number, because the mean of its divisors is an integer number (1560575607).

Almost surely, 2^3121151213 is an apocalyptic number.

It is an amenable number.

3121151213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121151213 is an equidigital number, since it uses as much as digits as its factorization.

3121151213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 3121151213 is about 55867.2642340754. The cubic root of 3121151213 is about 1461.4084133850.

Adding to 3121151213 its reverse (3121511213), we get a palindrome (6242662426).

Subtracting 3121151213 from its reverse (3121511213), we obtain a square (360000 = 600²).

The spelling of 3121151213 in words is "three billion, one hundred twenty-one million, one hundred fifty-one thousand, two hundred thirteen".