22123211213 has 2 divisors, whose sum is σ = 22123211214. Its totient is φ = 22123211212.

The previous prime is 22123211191. The next prime is 22123211219. The reversal of 22123211213 is 31211232122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16037183044 + 6086028169 = 126638^2 + 78013^2 .

It is a cyclic number.

It is not a de Polignac number, because 22123211213 - 2²⁰ = 22122162637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22123211219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061605606 + 11061605607.

It is an arithmetic number, because the mean of its divisors is an integer number (11061605607).

Almost surely, 2^22123211213 is an apocalyptic number.

It is an amenable number.

22123211213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123211213 is an equidigital number, since it uses as much as digits as its factorization.

22123211213 is an evil number, because the sum of its binary digits is even.

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

Adding to 22123211213 its reverse (31211232122), we get a palindrome (53334443335).

The spelling of 22123211213 in words is "twenty-two billion, one hundred twenty-three million, two hundred eleven thousand, two hundred thirteen".