1121221232213 has 2 divisors, whose sum is σ = 1121221232214. Its totient is φ = 1121221232212.

The previous prime is 1121221232203. The next prime is 1121221232233. The reversal of 1121221232213 is 3122321221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115691525169 + 5529707044 = 1056263^2 + 74362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121221232213 - 2⁸ = 1121221231957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121221232203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560610616106 + 560610616107.

It is an arithmetic number, because the mean of its divisors is an integer number (560610616107).

Almost surely, 2^{1121221232213} is an apocalyptic number.

It is an amenable number.

1121221232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121221232213 is an equidigital number, since it uses as much as digits as its factorization.

1121221232213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 1121221232213 its reverse (3122321221211), we get a palindrome (4243542453424).

The spelling of 1121221232213 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred thirteen".