1211222001113 has 2 divisors, whose sum is σ = 1211222001114. Its totient is φ = 1211222001112.

The previous prime is 1211222001061. The next prime is 1211222001127. The reversal of 1211222001113 is 3111002221121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710761966489 + 500460034624 = 843067^2 + 707432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211222001113 - 2³⁰ = 1210148259289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211222001091 and 1211222001100.

It is not a weakly prime, because it can be changed into another prime (1211222001173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611000556 + 605611000557.

It is an arithmetic number, because the mean of its divisors is an integer number (605611000557).

Almost surely, 2^{1211222001113} is an apocalyptic number.

It is an amenable number.

1211222001113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222001113 is an equidigital number, since it uses as much as digits as its factorization.

1211222001113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211222001113 its reverse (3111002221121), we get a palindrome (4322224222234).

The spelling of 1211222001113 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one thousand, one hundred thirteen".