31213411242145 has 64 divisors (see below), whose sum is σ = 42820542535680. Its totient is φ = 21620792793600.

The previous prime is 31213411242121. The next prime is 31213411242193. The reversal of 31213411242145 is 54124211431213.

It is not a de Polignac number, because 31213411242145 - 2⁹ = 31213411241633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31213411242145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 282954450 + ... + 283064740.

It is an arithmetic number, because the mean of its divisors is an integer number (669070977120).

Almost surely, 2^{31213411242145} is an apocalyptic number.

It is an amenable number.

31213411242145 is a deficient number, since it is larger than the sum of its proper divisors (11607131293535).

31213411242145 is a wasteful number, since it uses less digits than its factorization.

31213411242145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111286.

The product of its digits is 23040, while the sum is 34.

Adding to 31213411242145 its reverse (54124211431213), we get a palindrome (85337622673358).

The spelling of 31213411242145 in words is "thirty-one trillion, two hundred thirteen billion, four hundred eleven million, two hundred forty-two thousand, one hundred forty-five".