12120021983 has 4 divisors (see below), whose sum is σ = 12120997320. Its totient is φ = 12119046648.

The previous prime is 12120021941. The next prime is 12120022001. The reversal of 12120021983 is 38912002121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38912002121 = 37 ⋅1051675733.

It is a cyclic number.

It is not a de Polignac number, because 12120021983 - 2³⁰ = 11046280159 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 (12120021383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468785 + ... + 493962.

It is an arithmetic number, because the mean of its divisors is an integer number (3030249330).

Almost surely, 2^12120021983 is an apocalyptic number.

12120021983 is a deficient number, since it is larger than the sum of its proper divisors (975337).

12120021983 is an equidigital number, since it uses as much as digits as its factorization.

12120021983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975336.

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

The spelling of 12120021983 in words is "twelve billion, one hundred twenty million, twenty-one thousand, nine hundred eighty-three".