11285911021409 has 2 divisors, whose sum is σ = 11285911021410. Its totient is φ = 11285911021408.

The previous prime is 11285911021391. The next prime is 11285911021417. The reversal of 11285911021409 is 90412011958211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120230880784 + 2165680140625 = 3019972^2 + 1471625^2 .

It is a cyclic number.

It is not a de Polignac number, because 11285911021409 - 2²⁸ = 11285642585953 is a prime.

It is a super-2 number, since 2×11285911021409² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11285911021409.

It is not a weakly prime, because it can be changed into another prime (11285911021439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5642955510704 + 5642955510705.

It is an arithmetic number, because the mean of its divisors is an integer number (5642955510705).

Almost surely, 2^{11285911021409} is an apocalyptic number.

It is an amenable number.

11285911021409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11285911021409 is an equidigital number, since it uses as much as digits as its factorization.

11285911021409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 11285911021409 in words is "eleven trillion, two hundred eighty-five billion, nine hundred eleven million, twenty-one thousand, four hundred nine".