220331213213 has 4 divisors (see below), whose sum is σ = 220342418940. Its totient is φ = 220320007488.

The previous prime is 220331213147. The next prime is 220331213227. The reversal of 220331213213 is 312312133022.

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 19938004804 + 200393208409 = 141202^2 + 447653^2 .

It is a cyclic number.

It is not a de Polignac number, because 220331213213 - 2²⁶ = 220264104349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220331213233) 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, 5573318 + ... + 5612711.

It is an arithmetic number, because the mean of its divisors is an integer number (55085604735).

Almost surely, 2^220331213213 is an apocalyptic number.

It is an amenable number.

220331213213 is a deficient number, since it is larger than the sum of its proper divisors (11205727).

220331213213 is a wasteful number, since it uses less digits than its factorization.

220331213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205726.

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

Adding to 220331213213 its reverse (312312133022), we get a palindrome (532643346235).

The spelling of 220331213213 in words is "two hundred twenty billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred thirteen".