12021021983 has 4 divisors (see below), whose sum is σ = 12097589160. Its totient is φ = 11944454808.

The previous prime is 12021021949. The next prime is 12021021989. The reversal of 12021021983 is 38912012021.

12021021983 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 12021021983 - 2¹⁴ = 12021005599 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 (12021021989) 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, 38283353 + ... + 38283666.

It is an arithmetic number, because the mean of its divisors is an integer number (3024397290).

Almost surely, 2^12021021983 is an apocalyptic number.

12021021983 is a deficient number, since it is larger than the sum of its proper divisors (76567177).

12021021983 is an equidigital number, since it uses as much as digits as its factorization.

12021021983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76567176.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 12021021983 in words is "twelve billion, twenty-one million, twenty-one thousand, nine hundred eighty-three".