1131020340209 has 2 divisors, whose sum is σ = 1131020340210. Its totient is φ = 1131020340208.

The previous prime is 1131020340173. The next prime is 1131020340217. The reversal of 1131020340209 is 9020430201311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973077683809 + 157942656400 = 986447^2 + 397420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131020340209 - 2³⁶ = 1062300863473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131020348209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565510170104 + 565510170105.

It is an arithmetic number, because the mean of its divisors is an integer number (565510170105).

Almost surely, 2^{1131020340209} is an apocalyptic number.

It is an amenable number.

1131020340209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131020340209 is an equidigital number, since it uses as much as digits as its factorization.

1131020340209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 1131020340209 in words is "one trillion, one hundred thirty-one billion, twenty million, three hundred forty thousand, two hundred nine".