1123212133181 has 2 divisors, whose sum is σ = 1123212133182. Its totient is φ = 1123212133180.

The previous prime is 1123212133139. The next prime is 1123212133217. The reversal of 1123212133181 is 1813312123211.

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., 1024820127556 + 98392005625 = 1012334^2 + 313675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123212133181 - 2²⁶ = 1123145024317 is a prime.

It is a super-2 number, since 2×1123212133181² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123212133081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561606066590 + 561606066591.

It is an arithmetic number, because the mean of its divisors is an integer number (561606066591).

Almost surely, 2^{1123212133181} is an apocalyptic number.

It is an amenable number.

1123212133181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123212133181 is an equidigital number, since it uses as much as digits as its factorization.

1123212133181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

Adding to 1123212133181 its reverse (1813312123211), we get a palindrome (2936524256392).

The spelling of 1123212133181 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, one hundred thirty-three thousand, one hundred eighty-one".