2145112213 has 2 divisors, whose sum is σ = 2145112214. Its totient is φ = 2145112212.

The previous prime is 2145112187. The next prime is 2145112231. The reversal of 2145112213 is 3122115412.

Together with next prime (2145112231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1614593124 + 530519089 = 40182^2 + 23033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145112213 - 2²⁵ = 2111557781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145112243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072556106 + 1072556107.

It is an arithmetic number, because the mean of its divisors is an integer number (1072556107).

Almost surely, 2^2145112213 is an apocalyptic number.

It is an amenable number.

2145112213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145112213 is an equidigital number, since it uses as much as digits as its factorization.

2145112213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 2145112213 is about 46315.3561251557. The cubic root of 2145112213 is about 1289.6840788377.

Adding to 2145112213 its reverse (3122115412), we get a palindrome (5267227625).

The spelling of 2145112213 in words is "two billion, one hundred forty-five million, one hundred twelve thousand, two hundred thirteen".