3121450541213 has 4 divisors (see below), whose sum is σ = 3121584136860. Its totient is φ = 3121316945568.

The previous prime is 3121450541207. The next prime is 3121450541317.

3121450541213 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1816788581689 + 1304661959524 = 1347883^2 + 1142218^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121450541213 - 2⁴ = 3121450541197 is a prime.

It is a super-2 number, since 2×3121450541213² (a number of 26 digits) contains 22 as substring.

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 3121450541213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121450541813) 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, 66762770 + ... + 66809507.

It is an arithmetic number, because the mean of its divisors is an integer number (780396034215).

Almost surely, 2^{3121450541213} is an apocalyptic number.

It is an amenable number.

3121450541213 is a deficient number, since it is larger than the sum of its proper divisors (133595647).

3121450541213 is a wasteful number, since it uses less digits than its factorization.

3121450541213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133595646.

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

It can be divided in two parts, 3121450 and 541213, that added together give a palindrome (3662663).

The spelling of 3121450541213 in words is "three trillion, one hundred twenty-one billion, four hundred fifty million, five hundred forty-one thousand, two hundred thirteen".