12722193081 has 18 divisors (see below), whose sum is σ = 19898817198. Its totient is φ = 7829040960.

The previous prime is 12722193079. The next prime is 12722193119. The reversal of 12722193081 is 18039122721.

12722193081 is a `hidden beast` number, since 127 + 221 + 9 + 308 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 8503056 + 12713690025 = 2916^2 + 112755^2 .

It is not a de Polignac number, because 12722193081 - 2¹ = 12722193079 is a prime.

It is a super-2 number, since 2×12722193081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12722192081) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4180660 + ... + 4183701.

Almost surely, 2^12722193081 is an apocalyptic number.

It is an amenable number.

12722193081 is a deficient number, since it is larger than the sum of its proper divisors (7176624117).

12722193081 is a wasteful number, since it uses less digits than its factorization.

12722193081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364393 (or 8364377 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 12722193081 in words is "twelve billion, seven hundred twenty-two million, one hundred ninety-three thousand, eighty-one".