1223104121 has 2 divisors, whose sum is σ = 1223104122. Its totient is φ = 1223104120.

The previous prime is 1223104109. The next prime is 1223104139. The reversal of 1223104121 is 1214013221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060414096 + 162690025 = 32564^2 + 12755^2 .

It is an emirp because it is prime and its reverse (1214013221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223104121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223104121.

It is not a weakly prime, because it can be changed into another prime (1223104021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611552060 + 611552061.

It is an arithmetic number, because the mean of its divisors is an integer number (611552061).

Almost surely, 2^1223104121 is an apocalyptic number.

It is an amenable number.

1223104121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223104121 is an equidigital number, since it uses as much as digits as its factorization.

1223104121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1223104121 is about 34972.9055269933. The cubic root of 1223104121 is about 1069.4352045913.

Adding to 1223104121 its reverse (1214013221), we get a palindrome (2437117342).

The spelling of 1223104121 in words is "one billion, two hundred twenty-three million, one hundred four thousand, one hundred twenty-one".