1123410311321 has 2 divisors, whose sum is σ = 1123410311322. Its totient is φ = 1123410311320.

The previous prime is 1123410311267. The next prime is 1123410311383. The reversal of 1123410311321 is 1231130143211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 935543545225 + 187866766096 = 967235^2 + 433436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123410311321 is a prime.

It is a super-2 number, since 2×1123410311321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123410341321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561705155660 + 561705155661.

It is an arithmetic number, because the mean of its divisors is an integer number (561705155661).

Almost surely, 2^{1123410311321} is an apocalyptic number.

It is an amenable number.

1123410311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123410311321 is an equidigital number, since it uses as much as digits as its factorization.

1123410311321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1123410311321 its reverse (1231130143211), we get a palindrome (2354540454532).

The spelling of 1123410311321 in words is "one trillion, one hundred twenty-three billion, four hundred ten million, three hundred eleven thousand, three hundred twenty-one".