12271986841 has 9 divisors (see below), whose sum is σ = 12543970399. Its totient is φ = 12005784904.

The previous prime is 12271986827. The next prime is 12271986847. The reversal of 12271986841 is 14868917221.

The square root of 12271986841 is 110779.

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

It can be written as a sum of positive squares in only one way, i.e., 2231145225 + 10040841616 = 47235^2 + 100204^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12271986841 is a prime.

It is a super-2 number, since 2×12271986841² (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 (12271986847) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5205435 + ... + 5207791.

Almost surely, 2^12271986841 is an apocalyptic number.

12271986841 is the 110779-th square number.

12271986841 is the 55390-th centered octagonal number.

It is an amenable number.

12271986841 is a deficient number, since it is larger than the sum of its proper divisors (271983558).

12271986841 is an frugal number, since it uses more digits than its factorization.

12271986841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808 (or 2404 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

Multiplying 12271986841 by its sum of digits (49), we get a square (601327355209 = 775453²).

The spelling of 12271986841 in words is "twelve billion, two hundred seventy-one million, nine hundred eighty-six thousand, eight hundred forty-one".