1100133321961 has 2 divisors, whose sum is σ = 1100133321962. Its totient is φ = 1100133321960.

The previous prime is 1100133321943. The next prime is 1100133322031. The reversal of 1100133321961 is 1691233310011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1049690407936 + 50442914025 = 1024544^2 + 224595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100133321961 - 2¹¹ = 1100133319913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100133321901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550066660980 + 550066660981.

It is an arithmetic number, because the mean of its divisors is an integer number (550066660981).

Almost surely, 2^{1100133321961} is an apocalyptic number.

It is an amenable number.

1100133321961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100133321961 is an equidigital number, since it uses as much as digits as its factorization.

1100133321961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

Adding to 1100133321961 its reverse (1691233310011), we get a palindrome (2791366631972).

The spelling of 1100133321961 in words is "one trillion, one hundred billion, one hundred thirty-three million, three hundred twenty-one thousand, nine hundred sixty-one".