12023821669 has 2 divisors, whose sum is σ = 12023821670. Its totient is φ = 12023821668.

The previous prime is 12023821609. The next prime is 12023821679. The reversal of 12023821669 is 96612832021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12020491044 + 3330625 = 109638^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 12023821669 - 2⁹ = 12023821157 is a prime.

It is a super-2 number, since 2×12023821669² (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 (12023821609) 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 as a sum of consecutive naturals, namely, 6011910834 + 6011910835.

It is an arithmetic number, because the mean of its divisors is an integer number (6011910835).

Almost surely, 2^12023821669 is an apocalyptic number.

It is an amenable number.

12023821669 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023821669 is an equidigital number, since it uses as much as digits as its factorization.

12023821669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 12023821669 in words is "twelve billion, twenty-three million, eight hundred twenty-one thousand, six hundred sixty-nine".