12210019979 has 4 divisors (see below), whose sum is σ = 12493973976. Its totient is φ = 11926065984.

The previous prime is 12210019967. The next prime is 12210019981. The reversal of 12210019979 is 97991001221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97991001221 = 233 ⋅420562237.

It is a cyclic number.

It is not a de Polignac number, because 12210019979 - 2³² = 7915052683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210019919) 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 3 ways as a sum of consecutive naturals, for example, 141976934 + ... + 141977019.

It is an arithmetic number, because the mean of its divisors is an integer number (3123493494).

Almost surely, 2^12210019979 is an apocalyptic number.

12210019979 is a deficient number, since it is larger than the sum of its proper divisors (283953997).

12210019979 is an equidigital number, since it uses as much as digits as its factorization.

12210019979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283953996.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 12210019979 in words is "twelve billion, two hundred ten million, nineteen thousand, nine hundred seventy-nine".