12003992121 has 48 divisors (see below), whose sum is σ = 18540783360. Its totient is φ = 6832213920.

The previous prime is 12003992057. The next prime is 12003992129. The reversal of 12003992121 is 12129930021.

It is not a de Polignac number, because 12003992121 - 2⁶ = 12003992057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12003992129) 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 in 47 ways as a sum of consecutive naturals, for example, 10112290 + ... + 10113476.

It is an arithmetic number, because the mean of its divisors is an integer number (386266320).

Almost surely, 2^12003992121 is an apocalyptic number.

12003992121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12003992121 is a deficient number, since it is larger than the sum of its proper divisors (6536791239).

12003992121 is a wasteful number, since it uses less digits than its factorization.

12003992121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474 (or 1347 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 12003992121 in words is "twelve billion, three million, nine hundred ninety-two thousand, one hundred twenty-one".