12010806166921 has 9 divisors (see below), whose sum is σ = 12025244108749. Its totient is φ = 11996385551500.

The previous prime is 12010806166903. The next prime is 12010806166937. The reversal of 12010806166921 is 12966160801021.

The square root of 12010806166921 is 3465661.

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

It is a de Polignac number, because none of the positive numbers 2^k-12010806166921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12010806166951) 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, 3988974306 + ... + 3988977316.

Almost surely, 2^{12010806166921} is an apocalyptic number.

12010806166921 is the 3465661-st square number.

12010806166921 is the 1732831-st centered octagonal number.

It is an amenable number.

12010806166921 is a deficient number, since it is larger than the sum of its proper divisors (14437941828).

12010806166921 is an frugal number, since it uses more digits than its factorization.

12010806166921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324 (or 4162 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

Adding to 12010806166921 its reverse (12966160801021), we get a palindrome (24976966967942).

The spelling of 12010806166921 in words is "twelve trillion, ten billion, eight hundred six million, one hundred sixty-six thousand, nine hundred twenty-one".