12228811261 has 8 divisors (see below), whose sum is σ = 12344941400. Its totient is φ = 12112752960.

The previous prime is 12228811253. The next prime is 12228811271. The reversal of 12228811261 is 16211882221.

It can be written as a sum of positive squares in 4 ways, for example, as 25190361 + 12203620900 = 5019^2 + 110470^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12228811261 - 2³ = 12228811253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228811271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361951 + ... + 394291.

It is an arithmetic number, because the mean of its divisors is an integer number (1543117675).

Almost surely, 2^12228811261 is an apocalyptic number.

It is an amenable number.

12228811261 is a deficient number, since it is larger than the sum of its proper divisors (116130139).

12228811261 is a wasteful number, since it uses less digits than its factorization.

12228811261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35919.

The product of its digits is 6144, while the sum is 34.

The spelling of 12228811261 in words is "twelve billion, two hundred twenty-eight million, eight hundred eleven thousand, two hundred sixty-one".