1131019303261 has 2 divisors, whose sum is σ = 1131019303262. Its totient is φ = 1131019303260.

The previous prime is 1131019303237. The next prime is 1131019303273. The reversal of 1131019303261 is 1623039101311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1087809366361 + 43209936900 = 1042981^2 + 207870^2 .

It is an emirp because it is prime and its reverse (1623039101311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131019303261 - 2⁵ = 1131019303229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131019303201) 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, 565509651630 + 565509651631.

It is an arithmetic number, because the mean of its divisors is an integer number (565509651631).

Almost surely, 2^{1131019303261} is an apocalyptic number.

It is an amenable number.

1131019303261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131019303261 is an equidigital number, since it uses as much as digits as its factorization.

1131019303261 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.

The spelling of 1131019303261 in words is "one trillion, one hundred thirty-one billion, nineteen million, three hundred three thousand, two hundred sixty-one".