1123101281 has 2 divisors, whose sum is σ = 1123101282. Its totient is φ = 1123101280.

The previous prime is 1123101223. The next prime is 1123101313. The reversal of 1123101281 is 1821013211.

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., 721459600 + 401641681 = 26860^2 + 20041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123101281 - 2²² = 1118906977 is a prime.

It is a super-2 number, since 2×1123101281² = 2522712974767681922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123101781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561550640 + 561550641.

It is an arithmetic number, because the mean of its divisors is an integer number (561550641).

Almost surely, 2^1123101281 is an apocalyptic number.

It is an amenable number.

1123101281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123101281 is an equidigital number, since it uses as much as digits as its factorization.

1123101281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 1123101281 is about 33512.7032780109. The cubic root of 1123101281 is about 1039.4564717212.

Adding to 1123101281 its reverse (1821013211), we get a palindrome (2944114492).

The spelling of 1123101281 in words is "one billion, one hundred twenty-three million, one hundred one thousand, two hundred eighty-one".