12069123581 has 2 divisors, whose sum is σ = 12069123582. Its totient is φ = 12069123580.

The previous prime is 12069123557. The next prime is 12069123587. The reversal of 12069123581 is 18532196021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6293883556 + 5775240025 = 79334^2 + 75995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12069123581 is a prime.

It is a super-2 number, since 2×12069123581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12069123587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6034561790 + 6034561791.

It is an arithmetic number, because the mean of its divisors is an integer number (6034561791).

Almost surely, 2^12069123581 is an apocalyptic number.

It is an amenable number.

12069123581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12069123581 is an equidigital number, since it uses as much as digits as its factorization.

12069123581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 12069123581 in words is "twelve billion, sixty-nine million, one hundred twenty-three thousand, five hundred eighty-one".