213051343321 has 4 divisors (see below), whose sum is σ = 213102896292. Its totient is φ = 212999790352.

The previous prime is 213051343291. The next prime is 213051343333. The reversal of 213051343321 is 123343150312.

213051343321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 156341160000 + 56710183321 = 395400^2 + 238139^2 .

It is a cyclic number.

It is not a de Polignac number, because 213051343321 - 2¹³ = 213051335129 is a prime.

It is a super-4 number, since 4×213051343321⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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 213051343321.

It is not an unprimeable number, because it can be changed into a prime (213051323321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25770286 + ... + 25778551.

It is an arithmetic number, because the mean of its divisors is an integer number (53275724073).

Almost surely, 2^213051343321 is an apocalyptic number.

It is an amenable number.

213051343321 is a deficient number, since it is larger than the sum of its proper divisors (51552971).

213051343321 is an equidigital number, since it uses as much as digits as its factorization.

213051343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51552970.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 213051343321 its reverse (123343150312), we get a palindrome (336394493633).

The spelling of 213051343321 in words is "two hundred thirteen billion, fifty-one million, three hundred forty-three thousand, three hundred twenty-one".