12122021999 has 8 divisors (see below), whose sum is σ = 12259705920. Its totient is φ = 11984819616.

The previous prime is 12122021987. The next prime is 12122022037. The reversal of 12122021999 is 99912022121.

It is a happy number.

12122021999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12122021999 - 2¹² = 12122017903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122021909) 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, 69632 + ... + 170565.

It is an arithmetic number, because the mean of its divisors is an integer number (1532463240).

Almost surely, 2^12122021999 is an apocalyptic number.

12122021999 is a deficient number, since it is larger than the sum of its proper divisors (137683921).

12122021999 is a wasteful number, since it uses less digits than its factorization.

12122021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240769.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 12122021999 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, nine hundred ninety-nine".