213120112111111 has 2 divisors, whose sum is σ = 213120112111112. Its totient is φ = 213120112111110.

The previous prime is 213120112111037. The next prime is 213120112111117. The reversal of 213120112111111 is 111111211021312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213120112111111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120112111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560056055555 + 106560056055556.

It is an arithmetic number, because the mean of its divisors is an integer number (106560056055556).

Almost surely, 2^{213120112111111} is an apocalyptic number.

213120112111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120112111111 is an equidigital number, since it uses as much as digits as its factorization.

213120112111111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 213120112111111 its reverse (111111211021312), we get a palindrome (324231323132423).

The spelling of 213120112111111 in words is "two hundred thirteen trillion, one hundred twenty billion, one hundred twelve million, one hundred eleven thousand, one hundred eleven".