1123212232213 has 2 divisors, whose sum is σ = 1123212232214. Its totient is φ = 1123212232212.

The previous prime is 1123212232193. The next prime is 1123212232249. The reversal of 1123212232213 is 3122322123211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079755826769 + 43456405444 = 1039113^2 + 208462^2 .

It is an emirp because it is prime and its reverse (3122322123211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123212232213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123212230213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561606116106 + 561606116107.

It is an arithmetic number, because the mean of its divisors is an integer number (561606116107).

Almost surely, 2^{1123212232213} is an apocalyptic number.

It is an amenable number.

1123212232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123212232213 is an equidigital number, since it uses as much as digits as its factorization.

1123212232213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

Adding to 1123212232213 its reverse (3122322123211), we get a palindrome (4245534355424).

The spelling of 1123212232213 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, two hundred thirty-two thousand, two hundred thirteen".