12231707721 has 8 divisors (see below), whose sum is σ = 16316605344. Its totient is φ = 8150640960.

The previous prime is 12231707707. The next prime is 12231707771. The reversal of 12231707721 is 12770713221.

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

It is not a de Polignac number, because 12231707721 - 2¹⁷ = 12231576649 is a prime.

It is a super-2 number, since 2×12231707721² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12231707701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950256 + ... + 963041.

It is an arithmetic number, because the mean of its divisors is an integer number (2039575668).

Almost surely, 2^12231707721 is an apocalyptic number.

It is an amenable number.

12231707721 is a deficient number, since it is larger than the sum of its proper divisors (4084897623).

12231707721 is a wasteful number, since it uses less digits than its factorization.

12231707721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915431.

The product of its (nonzero) digits is 8232, while the sum is 33.

The spelling of 12231707721 in words is "twelve billion, two hundred thirty-one million, seven hundred seven thousand, seven hundred twenty-one".