3121254521213 has 4 divisors (see below), whose sum is σ = 3121553130588. Its totient is φ = 3120955911840.

The previous prime is 3121254521207. The next prime is 3121254521219.

3121254521213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3121254521207) and next prime (3121254521219).

It can be written as a sum of positive squares in 2 ways, for example, as 3037257729529 + 83996791684 = 1742773^2 + 289822^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121254521213 - 2¹⁶ = 3121254455677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121254521213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121254521219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149289008 + ... + 149309913.

It is an arithmetic number, because the mean of its divisors is an integer number (780388282647).

Almost surely, 2^{3121254521213} is an apocalyptic number.

It is an amenable number.

3121254521213 is a deficient number, since it is larger than the sum of its proper divisors (298609375).

3121254521213 is a wasteful number, since it uses less digits than its factorization.

3121254521213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298609374.

The product of its digits is 14400, while the sum is 32.

The spelling of 3121254521213 in words is "three trillion, one hundred twenty-one billion, two hundred fifty-four million, five hundred twenty-one thousand, two hundred thirteen".