1213211323 has 2 divisors, whose sum is σ = 1213211324. Its totient is φ = 1213211322.

The previous prime is 1213211297. The next prime is 1213211327. The reversal of 1213211323 is 3231123121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213211323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213211323.

It is not a weakly prime, because it can be changed into another prime (1213211327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606605661 + 606605662.

It is an arithmetic number, because the mean of its divisors is an integer number (606605662).

Almost surely, 2^1213211323 is an apocalyptic number.

1213211323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213211323 is an equidigital number, since it uses as much as digits as its factorization.

1213211323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 1213211323 is about 34831.1831983928. The cubic root of 1213211323 is about 1066.5441018135.

Adding to 1213211323 its reverse (3231123121), we get a palindrome (4444334444).

The spelling of 1213211323 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, three hundred twenty-three".