11229879961 has 2 divisors, whose sum is σ = 11229879962. Its totient is φ = 11229879960.

The previous prime is 11229879929. The next prime is 11229879971. The reversal of 11229879961 is 16997892211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8182287936 + 3047592025 = 90456^2 + 55205^2 .

It is an emirp because it is prime and its reverse (16997892211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11229879961 - 2⁵ = 11229879929 is a prime.

It is a super-2 number, since 2×11229879961² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11229879971) 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, 5614939980 + 5614939981.

It is an arithmetic number, because the mean of its divisors is an integer number (5614939981).

Almost surely, 2^11229879961 is an apocalyptic number.

It is an amenable number.

11229879961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11229879961 is an equidigital number, since it uses as much as digits as its factorization.

11229879961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 55.

The spelling of 11229879961 in words is "eleven billion, two hundred twenty-nine million, eight hundred seventy-nine thousand, nine hundred sixty-one".