12001211983 has 4 divisors (see below), whose sum is σ = 12068258040. Its totient is φ = 11934165928.

The previous prime is 12001211977. The next prime is 12001211987. The reversal of 12001211983 is 38911210021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38911210021 = 5569 ⋅6987109.

It is a cyclic number.

It is not a de Polignac number, because 12001211983 - 2¹³ = 12001203791 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 (12001211987) 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, 33522760 + ... + 33523117.

It is an arithmetic number, because the mean of its divisors is an integer number (3017064510).

Almost surely, 2^12001211983 is an apocalyptic number.

12001211983 is a deficient number, since it is larger than the sum of its proper divisors (67046057).

12001211983 is an equidigital number, since it uses as much as digits as its factorization.

12001211983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67046056.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 12001211983 in words is "twelve billion, one million, two hundred eleven thousand, nine hundred eighty-three".