12021019999 has 4 divisors (see below), whose sum is σ = 12435537960. Its totient is φ = 11606502040.

The previous prime is 12021019949. The next prime is 12021020129. The reversal of 12021019999 is 99991012021.

12021019999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12021019999 - 2¹⁷ = 12020888927 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 (12021019909) 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 3 ways as a sum of consecutive naturals, for example, 207258937 + ... + 207258994.

It is an arithmetic number, because the mean of its divisors is an integer number (3108884490).

Almost surely, 2^12021019999 is an apocalyptic number.

12021019999 is a deficient number, since it is larger than the sum of its proper divisors (414517961).

12021019999 is an equidigital number, since it uses as much as digits as its factorization.

12021019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414517960.

The product of its (nonzero) digits is 26244, while the sum is 43.

It can be divided in two parts, 1202 and 1019999, that added together give a palindrome (1021201).

The spelling of 12021019999 in words is "twelve billion, twenty-one million, nineteen thousand, nine hundred ninety-nine".