213230012173 has 2 divisors, whose sum is σ = 213230012174. Its totient is φ = 213230012172.

The previous prime is 213230012101. The next prime is 213230012197. The reversal of 213230012173 is 371210032312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127030226569 + 86199785604 = 356413^2 + 293598^2 .

It is a cyclic number.

It is not a de Polignac number, because 213230012173 - 2¹³ = 213230003981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213230012773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615006086 + 106615006087.

It is an arithmetic number, because the mean of its divisors is an integer number (106615006087).

Almost surely, 2^213230012173 is an apocalyptic number.

It is an amenable number.

213230012173 is a deficient number, since it is larger than the sum of its proper divisors (1).

213230012173 is an equidigital number, since it uses as much as digits as its factorization.

213230012173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 213230012173 its reverse (371210032312), we get a palindrome (584440044485).

The spelling of 213230012173 in words is "two hundred thirteen billion, two hundred thirty million, twelve thousand, one hundred seventy-three".