1213213319 has 2 divisors, whose sum is σ = 1213213320. Its totient is φ = 1213213318.

The previous prime is 1213213249. The next prime is 1213213321. The reversal of 1213213319 is 9133123121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213213319 - 2⁸ = 1213213063 is a prime.

It is a super-2 number, since 2×1213213319² = 2943773114797991522, which contains 22 as substring.

Together with 1213213321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213213369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606606659 + 606606660.

It is an arithmetic number, because the mean of its divisors is an integer number (606606660).

Almost surely, 2^1213213319 is an apocalyptic number.

1213213319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213213319 is an equidigital number, since it uses as much as digits as its factorization.

1213213319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 1213213319 is about 34831.2118508673. The cubic root of 1213213319 is about 1066.5446867133.

The spelling of 1213213319 in words is "one billion, two hundred thirteen million, two hundred thirteen thousand, three hundred nineteen".