213013113133321 has 4 divisors (see below), whose sum is σ = 213014317229892. Its totient is φ = 213011909036752.

The previous prime is 213013113133253. The next prime is 213013113133391. The reversal of 213013113133321 is 123331311310312.

It is a happy number.

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 191256065975296 + 21757047158025 = 13829536^2 + 4664445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213013113133321 is a prime.

It is a super-2 number, since 2×213013113133321² (a number of 29 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 213013113133321.

It is not an unprimeable number, because it can be changed into a prime (213013113133391) 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, 601782886 + ... + 602136751.

It is an arithmetic number, because the mean of its divisors is an integer number (53253579307473).

Almost surely, 2^{213013113133321} is an apocalyptic number.

It is an amenable number.

213013113133321 is a deficient number, since it is larger than the sum of its proper divisors (1204096571).

213013113133321 is a wasteful number, since it uses less digits than its factorization.

213013113133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204096570.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 213013113133321 its reverse (123331311310312), we get a palindrome (336344424443633).

The spelling of 213013113133321 in words is "two hundred thirteen trillion, thirteen billion, one hundred thirteen million, one hundred thirty-three thousand, three hundred twenty-one".