1213216223 has 2 divisors, whose sum is σ = 1213216224. Its totient is φ = 1213216222.

The previous prime is 1213216219. The next prime is 1213216231. The reversal of 1213216223 is 3226123121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213216223 - 2² = 1213216219 is a prime.

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 (1213216243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606608111 + 606608112.

It is an arithmetic number, because the mean of its divisors is an integer number (606608112).

Almost surely, 2^1213216223 is an apocalyptic number.

1213216223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213216223 is an equidigital number, since it uses as much as digits as its factorization.

1213216223 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1213216223 is about 34831.2535375918. The cubic root of 1213216223 is about 1066.5455376884.

Adding to 1213216223 its reverse (3226123121), we get a palindrome (4439339344).

The spelling of 1213216223 in words is "one billion, two hundred thirteen million, two hundred sixteen thousand, two hundred twenty-three".