12137343209161 has 3 divisors (see below), whose sum is σ = 12137346693031. Its totient is φ = 12137339725292.

The previous prime is 12137343209087. The next prime is 12137343209177. The reversal of 12137343209161 is 16190234373121.

The square root of 12137343209161 is 3483869.

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

12137343209161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 10710035119161 + 1427308090000 = 3272619^2 + 1194700^2 .

It is not a de Polignac number, because 12137343209161 - 2¹⁵ = 12137343176393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12137343200161) 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, 1741935 + ... + 5225803.

Almost surely, 2^{12137343209161} is an apocalyptic number.

12137343209161 is the 3483869-th square number.

12137343209161 is the 1741935-th centered octagonal number.

It is an amenable number.

12137343209161 is a deficient number, since it is larger than the sum of its proper divisors (3483870).

12137343209161 is an frugal number, since it uses more digits than its factorization.

12137343209161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967738 (or 3483869 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 12137343209161 in words is "twelve trillion, one hundred thirty-seven billion, three hundred forty-three million, two hundred nine thousand, one hundred sixty-one".