213120310013 has 4 divisors (see below), whose sum is σ = 229514180028. Its totient is φ = 196726440000.

The previous prime is 213120309977. The next prime is 213120310031. The reversal of 213120310013 is 310013021312.

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 20598564484 + 192521745529 = 143522^2 + 438773^2 .

It is a cyclic number.

It is not a de Polignac number, because 213120310013 - 2⁸ = 213120309757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213120309973 and 213120310000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213120310033) 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, 8196934988 + ... + 8196935013.

It is an arithmetic number, because the mean of its divisors is an integer number (57378545007).

Almost surely, 2^213120310013 is an apocalyptic number.

It is an amenable number.

213120310013 is a deficient number, since it is larger than the sum of its proper divisors (16393870015).

213120310013 is a wasteful number, since it uses less digits than its factorization.

213120310013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16393870014.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 213120310013 its reverse (310013021312), we get a palindrome (523133331325).

The spelling of 213120310013 in words is "two hundred thirteen billion, one hundred twenty million, three hundred ten thousand, thirteen".