12201720661673 has 8 divisors (see below), whose sum is σ = 12370983061248. Its totient is φ = 12033480996144.

The previous prime is 12201720661651. The next prime is 12201720661727. The reversal of 12201720661673 is 37616602710221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12201720661673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12201720601673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255659486 + ... + 255707207.

It is an arithmetic number, because the mean of its divisors is an integer number (1546372882656).

Almost surely, 2^{12201720661673} is an apocalyptic number.

It is an amenable number.

12201720661673 is a deficient number, since it is larger than the sum of its proper divisors (169262399575).

12201720661673 is a wasteful number, since it uses less digits than its factorization.

12201720661673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511367023.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 12201720661673 in words is "twelve trillion, two hundred one billion, seven hundred twenty million, six hundred sixty-one thousand, six hundred seventy-three".