11229859981 has 2 divisors, whose sum is σ = 11229859982. Its totient is φ = 11229859980.

The previous prime is 11229859969. The next prime is 11229859987. The reversal of 11229859981 is 18995892211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11158541956 + 71318025 = 105634^2 + 8445^2 .

It is a cyclic number.

It is not a de Polignac number, because 11229859981 - 2⁷ = 11229859853 is a prime.

It is a super-2 number, since 2×11229859981² (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 (11229859987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5614929990 + 5614929991.

It is an arithmetic number, because the mean of its divisors is an integer number (5614929991).

Almost surely, 2^11229859981 is an apocalyptic number.

It is an amenable number.

11229859981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11229859981 is an equidigital number, since it uses as much as digits as its factorization.

11229859981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 55.

The spelling of 11229859981 in words is "eleven billion, two hundred twenty-nine million, eight hundred fifty-nine thousand, nine hundred eighty-one".