1223103121 has 2 divisors, whose sum is σ = 1223103122. Its totient is φ = 1223103120.

The previous prime is 1223103083. The next prime is 1223103143. The reversal of 1223103121 is 1213013221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897661521 + 325441600 = 29961^2 + 18040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223103121 - 2⁹ = 1223102609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223103095 and 1223103104.

It is not a weakly prime, because it can be changed into another prime (1223103151) 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, 611551560 + 611551561.

It is an arithmetic number, because the mean of its divisors is an integer number (611551561).

Almost surely, 2^1223103121 is an apocalyptic number.

It is an amenable number.

1223103121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223103121 is an equidigital number, since it uses as much as digits as its factorization.

1223103121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223103121 is about 34972.8912302086. The cubic root of 1223103121 is about 1069.4349131374.

Adding to 1223103121 its reverse (1213013221), we get a palindrome (2436116342).

The spelling of 1223103121 in words is "one billion, two hundred twenty-three million, one hundred three thousand, one hundred twenty-one".