12227016961 has 4 divisors (see below), whose sum is σ = 12427459924. Its totient is φ = 12026574000.

The previous prime is 12227016911. The next prime is 12227016983. The reversal of 12227016961 is 16961072221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16961072221 = 11491 ⋅1476031.

It can be written as a sum of positive squares in 2 ways, for example, as 3288449025 + 8938567936 = 57345^2 + 94544^2 .

It is a cyclic number.

It is not a de Polignac number, because 12227016961 - 2⁷ = 12227016833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12227016961.

It is not an unprimeable number, because it can be changed into a prime (12227016911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100221390 + ... + 100221511.

It is an arithmetic number, because the mean of its divisors is an integer number (3106864981).

Almost surely, 2^12227016961 is an apocalyptic number.

It is an amenable number.

12227016961 is a deficient number, since it is larger than the sum of its proper divisors (200442963).

12227016961 is an equidigital number, since it uses as much as digits as its factorization.

12227016961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200442962.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 12227016961 in words is "twelve billion, two hundred twenty-seven million, sixteen thousand, nine hundred sixty-one".