1223313020213 has 4 divisors (see below), whose sum is σ = 1223600659788. Its totient is φ = 1223025380640.

The previous prime is 1223313020203. The next prime is 1223313020249. The reversal of 1223313020213 is 3120203133221.

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 749691027409 + 473621992804 = 865847^2 + 688202^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223313020213 - 2¹⁰ = 1223313019189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223313020203) 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, 143813408 + ... + 143821913.

It is an arithmetic number, because the mean of its divisors is an integer number (305900164947).

Almost surely, 2^{1223313020213} is an apocalyptic number.

It is an amenable number.

1223313020213 is a deficient number, since it is larger than the sum of its proper divisors (287639575).

1223313020213 is an equidigital number, since it uses as much as digits as its factorization.

1223313020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287639574.

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

Adding to 1223313020213 its reverse (3120203133221), we get a palindrome (4343516153434).

The spelling of 1223313020213 in words is "one trillion, two hundred twenty-three billion, three hundred thirteen million, twenty thousand, two hundred thirteen".