12201190681 has 3 divisors (see below), whose sum is σ = 12201301141. Its totient is φ = 12201080222.

The previous prime is 12201190669. The next prime is 12201190699. The reversal of 12201190681 is 18609110221.

It is a happy number.

The square root of 12201190681 is 110459.

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 is not a de Polignac number, because 12201190681 - 2²³ = 12192802073 is a prime.

It is a super-2 number, since 2×12201190681² (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 (12201190601) 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, 55230 + ... + 165688.

Almost surely, 2^12201190681 is an apocalyptic number.

12201190681 is the 110459-th square number.

12201190681 is the 55230-th centered octagonal number.

It is an amenable number.

12201190681 is a deficient number, since it is larger than the sum of its proper divisors (110460).

12201190681 is an frugal number, since it uses more digits than its factorization.

12201190681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220918 (or 110459 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 12201190681 in words is "twelve billion, two hundred one million, one hundred ninety thousand, six hundred eighty-one".