12210199979 has 2 divisors, whose sum is σ = 12210199980. Its totient is φ = 12210199978.

The previous prime is 12210199951. The next prime is 12210199987. The reversal of 12210199979 is 97999101221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12210199979 - 2⁸ = 12210199723 is a prime.

It is not a weakly prime, because it can be changed into another prime (12210199909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105099989 + 6105099990.

It is an arithmetic number, because the mean of its divisors is an integer number (6105099990).

Almost surely, 2^12210199979 is an apocalyptic number.

12210199979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210199979 is an equidigital number, since it uses as much as digits as its factorization.

12210199979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 50.

The spelling of 12210199979 in words is "twelve billion, two hundred ten million, one hundred ninety-nine thousand, nine hundred seventy-nine".