221233211101213 has 4 divisors (see below), whose sum is σ = 221233614967708. Its totient is φ = 221232807234720.

The previous prime is 221233211101181. The next prime is 221233211101261. The reversal of 221233211101213 is 312101112332122.

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 44319084078564 + 176914127022649 = 6657258^2 + 13300907^2 .

It is a cyclic number.

It is not a de Polignac number, because 221233211101213 - 2⁵ = 221233211101181 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 (221233211501213) 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, 201110448 + ... + 202207513.

It is an arithmetic number, because the mean of its divisors is an integer number (55308403741927).

Almost surely, 2^{221233211101213} is an apocalyptic number.

It is an amenable number.

221233211101213 is a deficient number, since it is larger than the sum of its proper divisors (403866495).

221233211101213 is an equidigital number, since it uses as much as digits as its factorization.

221233211101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403866494.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221233211101213 its reverse (312101112332122), we get a palindrome (533334323433335).

The spelling of 221233211101213 in words is "two hundred twenty-one trillion, two hundred thirty-three billion, two hundred eleven million, one hundred one thousand, two hundred thirteen".