2111111213 has 2 divisors, whose sum is σ = 2111111214. Its totient is φ = 2111111212.

The previous prime is 2111111209. The next prime is 2111111291. The reversal of 2111111213 is 3121111112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1826109289 + 285001924 = 42733^2 + 16882^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111111213 - 2² = 2111111209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111111293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055555606 + 1055555607.

It is an arithmetic number, because the mean of its divisors is an integer number (1055555607).

Almost surely, 2^2111111213 is an apocalyptic number.

It is an amenable number.

2111111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111111213 is an equidigital number, since it uses as much as digits as its factorization.

2111111213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 14.

The square root of 2111111213 is about 45946.8302824036. The cubic root of 2111111213 is about 1282.8337310635.

Adding to 2111111213 its reverse (3121111112), we get a palindrome (5232222325).

The spelling of 2111111213 in words is "two billion, one hundred eleven million, one hundred eleven thousand, two hundred thirteen".