20113223213 has 2 divisors, whose sum is σ = 20113223214. Its totient is φ = 20113223212.

The previous prime is 20113223183. The next prime is 20113223227. The reversal of 20113223213 is 31232231102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20034137764 + 79085449 = 141542^2 + 8893^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113223213 - 2²⁴ = 20096445997 is a prime.

It is a super-3 number, since 3×20113223213³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113223293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056611606 + 10056611607.

It is an arithmetic number, because the mean of its divisors is an integer number (10056611607).

Almost surely, 2^20113223213 is an apocalyptic number.

It is an amenable number.

20113223213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113223213 is an equidigital number, since it uses as much as digits as its factorization.

20113223213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20113223213 its reverse (31232231102), we get a palindrome (51345454315).

The spelling of 20113223213 in words is "twenty billion, one hundred thirteen million, two hundred twenty-three thousand, two hundred thirteen".