1101235355509 has 2 divisors, whose sum is σ = 1101235355510. Its totient is φ = 1101235355508.

The previous prime is 1101235355501. The next prime is 1101235355531. The reversal of 1101235355509 is 9055535321011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046723379025 + 54511976484 = 1023095^2 + 233478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101235355509 - 2³ = 1101235355501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101235355501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550617677754 + 550617677755.

It is an arithmetic number, because the mean of its divisors is an integer number (550617677755).

Almost surely, 2^{1101235355509} is an apocalyptic number.

It is an amenable number.

1101235355509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101235355509 is an equidigital number, since it uses as much as digits as its factorization.

1101235355509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101250, while the sum is 40.

The spelling of 1101235355509 in words is "one trillion, one hundred one billion, two hundred thirty-five million, three hundred fifty-five thousand, five hundred nine".