12210999979 has 2 divisors, whose sum is σ = 12210999980. Its totient is φ = 12210999978.

The previous prime is 12210999973. The next prime is 12211000003. The reversal of 12210999979 is 97999901221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97999901221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12210999979 - 2⁹ = 12210999467 is a prime.

It is not a weakly prime, because it can be changed into another prime (12210999973) 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 as a sum of consecutive naturals, namely, 6105499989 + 6105499990.

It is an arithmetic number, because the mean of its divisors is an integer number (6105499990).

Almost surely, 2^12210999979 is an apocalyptic number.

12210999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210999979 is an equidigital number, since it uses as much as digits as its factorization.

12210999979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653372, while the sum is 58.

The spelling of 12210999979 in words is "twelve billion, two hundred ten million, nine hundred ninety-nine thousand, nine hundred seventy-nine".