1123009103081 has 2 divisors, whose sum is σ = 1123009103082. Its totient is φ = 1123009103080.

The previous prime is 1123009103077. The next prime is 1123009103093. The reversal of 1123009103081 is 1803019003211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871823701225 + 251185401856 = 933715^2 + 501184^2 .

It is an emirp because it is prime and its reverse (1803019003211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123009103081 - 2² = 1123009103077 is a prime.

It is a super-2 number, since 2×1123009103081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123009105081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561504551540 + 561504551541.

It is an arithmetic number, because the mean of its divisors is an integer number (561504551541).

Almost surely, 2^{1123009103081} is an apocalyptic number.

It is an amenable number.

1123009103081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123009103081 is an equidigital number, since it uses as much as digits as its factorization.

1123009103081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1123009103081 in words is "one trillion, one hundred twenty-three billion, nine million, one hundred three thousand, eighty-one".