12201229961 has 2 divisors, whose sum is σ = 12201229962. Its totient is φ = 12201229960.

The previous prime is 12201229949. The next prime is 12201230039. The reversal of 12201229961 is 16992210221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7321369225 + 4879860736 = 85565^2 + 69856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201229961 - 2¹⁰ = 12201228937 is a prime.

It is a super-4 number, since 4×12201229961⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12201229361) 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, 6100614980 + 6100614981.

It is an arithmetic number, because the mean of its divisors is an integer number (6100614981).

Almost surely, 2^12201229961 is an apocalyptic number.

It is an amenable number.

12201229961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12201229961 is an equidigital number, since it uses as much as digits as its factorization.

12201229961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 12201229961 in words is "twelve billion, two hundred one million, two hundred twenty-nine thousand, nine hundred sixty-one".