1123705308281 has 2 divisors, whose sum is σ = 1123705308282. Its totient is φ = 1123705308280.

The previous prime is 1123705308247. The next prime is 1123705308457. The reversal of 1123705308281 is 1828035073211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719570475625 + 404134832656 = 848275^2 + 635716^2 .

It is an emirp because it is prime and its reverse (1828035073211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123705308281 - 2¹⁸ = 1123705046137 is a prime.

It is a super-2 number, since 2×1123705308281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123705301281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561852654140 + 561852654141.

It is an arithmetic number, because the mean of its divisors is an integer number (561852654141).

Almost surely, 2^{1123705308281} is an apocalyptic number.

It is an amenable number.

1123705308281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123705308281 is an equidigital number, since it uses as much as digits as its factorization.

1123705308281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 1123705308281 in words is "one trillion, one hundred twenty-three billion, seven hundred five million, three hundred eight thousand, two hundred eighty-one".