11205442861 has 2 divisors, whose sum is σ = 11205442862. Its totient is φ = 11205442860.

The previous prime is 11205442837. The next prime is 11205442877. The reversal of 11205442861 is 16824450211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10215144900 + 990297961 = 101070^2 + 31469^2 .

It is a cyclic number.

It is not a de Polignac number, because 11205442861 - 2²¹ = 11203345709 is a prime.

It is a super-2 number, since 2×11205442861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11205442891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5602721430 + 5602721431.

It is an arithmetic number, because the mean of its divisors is an integer number (5602721431).

Almost surely, 2^11205442861 is an apocalyptic number.

It is an amenable number.

11205442861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11205442861 is an equidigital number, since it uses as much as digits as its factorization.

11205442861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 11205442861 in words is "eleven billion, two hundred five million, four hundred forty-two thousand, eight hundred sixty-one".