1123320210421 has 2 divisors, whose sum is σ = 1123320210422. Its totient is φ = 1123320210420.

The previous prime is 1123320210413. The next prime is 1123320210461. The reversal of 1123320210421 is 1240120233211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121512770225 + 1807440196 = 1059015^2 + 42514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123320210421 - 2³ = 1123320210413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123320210392 and 1123320210401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123320210461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561660105210 + 561660105211.

It is an arithmetic number, because the mean of its divisors is an integer number (561660105211).

Almost surely, 2^{1123320210421} is an apocalyptic number.

It is an amenable number.

1123320210421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123320210421 is an equidigital number, since it uses as much as digits as its factorization.

1123320210421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1123320210421 its reverse (1240120233211), we get a palindrome (2363440443632).

The spelling of 1123320210421 in words is "one trillion, one hundred twenty-three billion, three hundred twenty million, two hundred ten thousand, four hundred twenty-one".