213213211223 has 2 divisors, whose sum is σ = 213213211224. Its totient is φ = 213213211222.

The previous prime is 213213211199. The next prime is 213213211243. The reversal of 213213211223 is 322112312312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213213211223 - 2¹² = 213213207127 is a prime.

It is a super-2 number, since 2×213213211223² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213213211243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106606605611 + 106606605612.

It is an arithmetic number, because the mean of its divisors is an integer number (106606605612).

Almost surely, 2^213213211223 is an apocalyptic number.

213213211223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213213211223 is an equidigital number, since it uses as much as digits as its factorization.

213213211223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

Adding to 213213211223 its reverse (322112312312), we get a palindrome (535325523535).

The spelling of 213213211223 in words is "two hundred thirteen billion, two hundred thirteen million, two hundred eleven thousand, two hundred twenty-three".