1212023173 has 2 divisors, whose sum is σ = 1212023174. Its totient is φ = 1212023172.

The previous prime is 1212023123. The next prime is 1212023191. The reversal of 1212023173 is 3713202121.

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., 1192113729 + 19909444 = 34527^2 + 4462^2 .

It is an emirp because it is prime and its reverse (3713202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212023173 - 2²¹ = 1209926021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212023123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606011586 + 606011587.

It is an arithmetic number, because the mean of its divisors is an integer number (606011587).

Almost surely, 2^1212023173 is an apocalyptic number.

It is an amenable number.

1212023173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212023173 is an equidigital number, since it uses as much as digits as its factorization.

1212023173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1212023173 is about 34814.1231829842. The cubic root of 1212023173 is about 1066.1958172636.

Adding to 1212023173 its reverse (3713202121), we get a palindrome (4925225294).

The spelling of 1212023173 in words is "one billion, two hundred twelve million, twenty-three thousand, one hundred seventy-three".