12771486121 has 3 divisors (see below), whose sum is σ = 12771599133. Its totient is φ = 12771373110.

The previous prime is 12771486107. The next prime is 12771486127. The reversal of 12771486121 is 12168417721.

It is a happy number.

The square root of 12771486121 is 113011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12168417721 = 1571 ⋅7745651.

It is not a de Polignac number, because 12771486121 - 2¹⁵ = 12771453353 is a prime.

It is a super-2 number, since 2×12771486121² (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 (12771486127) 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, 56506 + ... + 169516.

It is an arithmetic number, because the mean of its divisors is an integer number (4257199711).

Almost surely, 2^12771486121 is an apocalyptic number.

12771486121 is the 113011-st square number.

12771486121 is the 56506-th centered octagonal number.

It is an amenable number.

12771486121 is a deficient number, since it is larger than the sum of its proper divisors (113012).

12771486121 is an frugal number, since it uses more digits than its factorization.

12771486121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226022 (or 113011 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The spelling of 12771486121 in words is "twelve billion, seven hundred seventy-one million, four hundred eighty-six thousand, one hundred twenty-one".