12026698010209 has 3 divisors (see below), whose sum is σ = 12026701478163. Its totient is φ = 12026694542256.

The previous prime is 12026698010101. The next prime is 12026698010221. The reversal of 12026698010209 is 90201089662021.

The square root of 12026698010209 is 3467953.

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., 9828381750625 + 2198316259584 = 3135025^2 + 1482672^2 .

It is not a de Polignac number, because 12026698010209 - 2²³ = 12026689621601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12026698010269) 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, 1733977 + ... + 5201929.

It is an arithmetic number, because the mean of its divisors is an integer number (4008900492721).

Almost surely, 2^{12026698010209} is an apocalyptic number.

12026698010209 is the 3467953-rd square number.

12026698010209 is the 1733977-th centered octagonal number.

It is an amenable number.

12026698010209 is a deficient number, since it is larger than the sum of its proper divisors (3467954).

12026698010209 is an frugal number, since it uses more digits than its factorization.

12026698010209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935906 (or 3467953 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 12026698010209 in words is "twelve trillion, twenty-six billion, six hundred ninety-eight million, ten thousand, two hundred nine".