221213332213 has 2 divisors, whose sum is σ = 221213332214. Its totient is φ = 221213332212.

The previous prime is 221213332189. The next prime is 221213332217. The reversal of 221213332213 is 312233312122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221199021124 + 14311089 = 470318^2 + 3783^2 .

It is a cyclic number.

It is not a de Polignac number, because 221213332213 - 2¹³ = 221213324021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221213332217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606666106 + 110606666107.

It is an arithmetic number, because the mean of its divisors is an integer number (110606666107).

Almost surely, 2^221213332213 is an apocalyptic number.

It is an amenable number.

221213332213 is a deficient number, since it is larger than the sum of its proper divisors (1).

221213332213 is an equidigital number, since it uses as much as digits as its factorization.

221213332213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

Adding to 221213332213 its reverse (312233312122), we get a palindrome (533446644335).

The spelling of 221213332213 in words is "two hundred twenty-one billion, two hundred thirteen million, three hundred thirty-two thousand, two hundred thirteen".