12122021018 has 16 divisors (see below), whose sum is σ = 18570958560. Its totient is φ = 5933041776.

The previous prime is 12122021017. The next prime is 12122021053. The reversal of 12122021018 is 81012022121.

12122021018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12122021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316880 + ... + 353067.

It is an arithmetic number, because the mean of its divisors is an integer number (1160684910).

Almost surely, 2^12122021018 is an apocalyptic number.

12122021018 is a deficient number, since it is larger than the sum of its proper divisors (6448937542).

12122021018 is a wasteful number, since it uses less digits than its factorization.

12122021018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670141.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12122021018 its reverse (81012022121), we get a palindrome (93134043139).

The spelling of 12122021018 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, eighteen".