1111321213213 has 2 divisors, whose sum is σ = 1111321213214. Its totient is φ = 1111321213212.

The previous prime is 1111321213169. The next prime is 1111321213243. The reversal of 1111321213213 is 3123121231111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578241618084 + 533079595129 = 760422^2 + 730123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111321213213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111321213243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555660606606 + 555660606607.

It is an arithmetic number, because the mean of its divisors is an integer number (555660606607).

Almost surely, 2^{1111321213213} is an apocalyptic number.

It is an amenable number.

1111321213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111321213213 is an equidigital number, since it uses as much as digits as its factorization.

1111321213213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

Adding to 1111321213213 its reverse (3123121231111), we get a palindrome (4234442444324).

The spelling of 1111321213213 in words is "one trillion, one hundred eleven billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred thirteen".