1199385479261 has 2 divisors, whose sum is σ = 1199385479262. Its totient is φ = 1199385479260.

The previous prime is 1199385479219. The next prime is 1199385479267. The reversal of 1199385479261 is 1629745839911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755004588100 + 444380891161 = 868910^2 + 666619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199385479261 - 2⁶ = 1199385479197 is a prime.

It is a super-2 number, since 2×1199385479261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1199385479267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599692739630 + 599692739631.

It is an arithmetic number, because the mean of its divisors is an integer number (599692739631).

Almost surely, 2^{1199385479261} is an apocalyptic number.

It is an amenable number.

1199385479261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199385479261 is an equidigital number, since it uses as much as digits as its factorization.

1199385479261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 65.

The spelling of 1199385479261 in words is "one trillion, one hundred ninety-nine billion, three hundred eighty-five million, four hundred seventy-nine thousand, two hundred sixty-one".