221013122213 has 4 divisors (see below), whose sum is σ = 238014131628. Its totient is φ = 204012112800.

The previous prime is 221013122167. The next prime is 221013122227. The reversal of 221013122213 is 312221310122.

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 52467567364 + 168545554849 = 229058^2 + 410543^2 .

It is a cyclic number.

It is not a de Polignac number, because 221013122213 - 2²⁰ = 221012073637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013122233) 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, 8500504688 + ... + 8500504713.

It is an arithmetic number, because the mean of its divisors is an integer number (59503532907).

Almost surely, 2^221013122213 is an apocalyptic number.

It is an amenable number.

221013122213 is a deficient number, since it is larger than the sum of its proper divisors (17001009415).

221013122213 is a wasteful number, since it uses less digits than its factorization.

221013122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001009414.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221013122213 its reverse (312221310122), we get a palindrome (533234432335).

The spelling of 221013122213 in words is "two hundred twenty-one billion, thirteen million, one hundred twenty-two thousand, two hundred thirteen".