1131213232213 has 2 divisors, whose sum is σ = 1131213232214. Its totient is φ = 1131213232212.

The previous prime is 1131213232159. The next prime is 1131213232217. The reversal of 1131213232213 is 3122323121311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1121900403204 + 9312829009 = 1059198^2 + 96503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131213232213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131213232217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565606616106 + 565606616107.

It is an arithmetic number, because the mean of its divisors is an integer number (565606616107).

Almost surely, 2^{1131213232213} is an apocalyptic number.

It is an amenable number.

1131213232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131213232213 is an equidigital number, since it uses as much as digits as its factorization.

1131213232213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

Adding to 1131213232213 its reverse (3122323121311), we get a palindrome (4253536353524).

The spelling of 1131213232213 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, two hundred thirty-two thousand, two hundred thirteen".