12019682981 has 4 divisors (see below), whose sum is σ = 12022185132. Its totient is φ = 12017180832.

The previous prime is 12019682947. The next prime is 12019683001. The reversal of 12019682981 is 18928691021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10949738881 + 1069944100 = 104641^2 + 32710^2 .

It is a cyclic number.

It is not a de Polignac number, because 12019682981 - 2²² = 12015488677 is a prime.

It is a super-2 number, since 2×12019682981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12019682581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243856 + ... + 1253481.

It is an arithmetic number, because the mean of its divisors is an integer number (3005546283).

Almost surely, 2^12019682981 is an apocalyptic number.

It is an amenable number.

12019682981 is a deficient number, since it is larger than the sum of its proper divisors (2502151).

12019682981 is an equidigital number, since it uses as much as digits as its factorization.

12019682981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502150.

The product of its (nonzero) digits is 124416, while the sum is 47.

The spelling of 12019682981 in words is "twelve billion, nineteen million, six hundred eighty-two thousand, nine hundred eighty-one".