1131212273 has 2 divisors, whose sum is σ = 1131212274. Its totient is φ = 1131212272.

The previous prime is 1131212237. The next prime is 1131212279. The reversal of 1131212273 is 3722121311.

Together with previous prime (1131212237) 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., 1127079184 + 4133089 = 33572^2 + 2033^2 .

It is an emirp because it is prime and its reverse (3722121311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131212273 - 2¹⁴ = 1131195889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131212279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565606136 + 565606137.

It is an arithmetic number, because the mean of its divisors is an integer number (565606137).

Almost surely, 2^1131212273 is an apocalyptic number.

It is an amenable number.

1131212273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131212273 is an equidigital number, since it uses as much as digits as its factorization.

1131212273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 1131212273 is about 33633.4992678431. The cubic root of 1131212273 is about 1041.9527761186.

Adding to 1131212273 its reverse (3722121311), we get a palindrome (4853333584).

The spelling of 1131212273 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, two hundred seventy-three".