12244895721 has 12 divisors (see below), whose sum is σ = 17718054640. Its totient is φ = 8148963960.

The previous prime is 12244895693. The next prime is 12244895771. The reversal of 12244895721 is 12759844221.

12244895721 is a `hidden beast` number, since 12 + 24 + 48 + 9 + 572 + 1 = 666.

It is not a de Polignac number, because 12244895721 - 2¹¹ = 12244893673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12244895771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1186231 + ... + 1196508.

Almost surely, 2^12244895721 is an apocalyptic number.

It is an amenable number.

12244895721 is a deficient number, since it is larger than the sum of its proper divisors (5473158919).

12244895721 is a wasteful number, since it uses less digits than its factorization.

12244895721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383316 (or 2383313 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 12244895721 in words is "twelve billion, two hundred forty-four million, eight hundred ninety-five thousand, seven hundred twenty-one".