1104321211561 has 2 divisors, whose sum is σ = 1104321211562. Its totient is φ = 1104321211560.

The previous prime is 1104321211423. The next prime is 1104321211571. The reversal of 1104321211561 is 1651121234011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638984403225 + 465336808336 = 799365^2 + 682156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1104321211561 - 2²³ = 1104312822953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1104321211571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552160605780 + 552160605781.

It is an arithmetic number, because the mean of its divisors is an integer number (552160605781).

Almost surely, 2^{1104321211561} is an apocalyptic number.

It is an amenable number.

1104321211561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1104321211561 is an equidigital number, since it uses as much as digits as its factorization.

1104321211561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

Adding to 1104321211561 its reverse (1651121234011), we get a palindrome (2755442445572).

The spelling of 1104321211561 in words is "one trillion, one hundred four billion, three hundred twenty-one million, two hundred eleven thousand, five hundred sixty-one".