1211303003213 has 2 divisors, whose sum is σ = 1211303003214. Its totient is φ = 1211303003212.

The previous prime is 1211303003177. The next prime is 1211303003279. The reversal of 1211303003213 is 3123003031121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184433892489 + 26869110724 = 1088317^2 + 163918^2 .

It is an emirp because it is prime and its reverse (3123003031121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211303003213 - 2¹⁸ = 1211302741069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211303008213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605651501606 + 605651501607.

It is an arithmetic number, because the mean of its divisors is an integer number (605651501607).

Almost surely, 2^{1211303003213} is an apocalyptic number.

It is an amenable number.

1211303003213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211303003213 is an equidigital number, since it uses as much as digits as its factorization.

1211303003213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1211303003213 its reverse (3123003031121), we get a palindrome (4334306034334).

The spelling of 1211303003213 in words is "one trillion, two hundred eleven billion, three hundred three million, three thousand, two hundred thirteen".