213111121103 has 2 divisors, whose sum is σ = 213111121104. Its totient is φ = 213111121102.

The previous prime is 213111121031. The next prime is 213111121141. The reversal of 213111121103 is 301121111312.

Together with previous prime (213111121031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213111121103 - 2⁸ = 213111120847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213111121163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555560551 + 106555560552.

It is an arithmetic number, because the mean of its divisors is an integer number (106555560552).

Almost surely, 2^213111121103 is an apocalyptic number.

213111121103 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111121103 is an equidigital number, since it uses as much as digits as its factorization.

213111121103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 213111121103 its reverse (301121111312), we get a palindrome (514232232415).

The spelling of 213111121103 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twenty-one thousand, one hundred three".