1211104412213 has 2 divisors, whose sum is σ = 1211104412214. Its totient is φ = 1211104412212.

The previous prime is 1211104412191. The next prime is 1211104412257. The reversal of 1211104412213 is 3122144011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729054699409 + 482049712804 = 853847^2 + 694298^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211104412213 - 2²⁴ = 1211087634997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211104412263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605552206106 + 605552206107.

It is an arithmetic number, because the mean of its divisors is an integer number (605552206107).

Almost surely, 2^{1211104412213} is an apocalyptic number.

It is an amenable number.

1211104412213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211104412213 is an equidigital number, since it uses as much as digits as its factorization.

1211104412213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 1211104412213 its reverse (3122144011121), we get a palindrome (4333248423334).

The spelling of 1211104412213 in words is "one trillion, two hundred eleven billion, one hundred four million, four hundred twelve thousand, two hundred thirteen".