1121611723 has 2 divisors, whose sum is σ = 1121611724. Its totient is φ = 1121611722.

The previous prime is 1121611717. The next prime is 1121611759. The reversal of 1121611723 is 3271161211.

It is a weak prime.

It is an emirp because it is prime and its reverse (3271161211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121611723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121611793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560805861 + 560805862.

It is an arithmetic number, because the mean of its divisors is an integer number (560805862).

Almost surely, 2^1121611723 is an apocalyptic number.

1121611723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121611723 is an equidigital number, since it uses as much as digits as its factorization.

1121611723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 1121611723 is about 33490.4721226799. The cubic root of 1121611723 is about 1038.9967281682.

Adding to 1121611723 its reverse (3271161211), we get a palindrome (4392772934).

The spelling of 1121611723 in words is "one billion, one hundred twenty-one million, six hundred eleven thousand, seven hundred twenty-three".