12411965281 has 3 divisors (see below), whose sum is σ = 12412076691. Its totient is φ = 12411853872.

The previous prime is 12411965273. The next prime is 12411965299. The reversal of 12411965281 is 18256911421.

The square root of 12411965281 is 111409.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5214139681 + 7197825600 = 72209^2 + 84840^2 .

It is not a de Polignac number, because 12411965281 - 2³ = 12411965273 is a prime.

It is a super-2 number, since 2×12411965281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12411965381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55705 + ... + 167113.

It is an arithmetic number, because the mean of its divisors is an integer number (4137358897).

Almost surely, 2^12411965281 is an apocalyptic number.

12411965281 is the 111409-th square number.

12411965281 is the 55705-th centered octagonal number.

It is an amenable number.

12411965281 is a deficient number, since it is larger than the sum of its proper divisors (111410).

12411965281 is an frugal number, since it uses more digits than its factorization.

12411965281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222818 (or 111409 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The spelling of 12411965281 in words is "twelve billion, four hundred eleven million, nine hundred sixty-five thousand, two hundred eighty-one".