213031322321 has 4 divisors (see below), whose sum is σ = 224243497200. Its totient is φ = 201819147444.

The previous prime is 213031322311. The next prime is 213031322327. The reversal of 213031322321 is 123223130312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213031322321 - 2¹⁰ = 213031321297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213031322327) 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, 5606087411 + ... + 5606087448.

It is an arithmetic number, because the mean of its divisors is an integer number (56060874300).

Almost surely, 2^213031322321 is an apocalyptic number.

It is an amenable number.

213031322321 is a deficient number, since it is larger than the sum of its proper divisors (11212174879).

213031322321 is a wasteful number, since it uses less digits than its factorization.

213031322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11212174878.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213031322321 its reverse (123223130312), we get a palindrome (336254452633).

The spelling of 213031322321 in words is "two hundred thirteen billion, thirty-one million, three hundred twenty-two thousand, three hundred twenty-one".