1123090121 has 2 divisors, whose sum is σ = 1123090122. Its totient is φ = 1123090120.

The previous prime is 1123090099. The next prime is 1123090127. The reversal of 1123090121 is 1210903211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1094617225 + 28472896 = 33085^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123090121 - 2¹⁸ = 1122827977 is a prime.

It is a super-2 number, since 2×1123090121² = 2522662839775589282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123090093 and 1123090102.

It is not a weakly prime, because it can be changed into another prime (1123090127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561545060 + 561545061.

It is an arithmetic number, because the mean of its divisors is an integer number (561545061).

Almost surely, 2^1123090121 is an apocalyptic number.

It is an amenable number.

1123090121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123090121 is an equidigital number, since it uses as much as digits as its factorization.

1123090121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1123090121 is about 33512.5367735718. The cubic root of 1123090121 is about 1039.4530287629.

Adding to 1123090121 its reverse (1210903211), we get a palindrome (2333993332).

It can be divided in two parts, 1123090 and 121, that added together give a palindrome (1123211).

The spelling of 1123090121 in words is "one billion, one hundred twenty-three million, ninety thousand, one hundred twenty-one".