212111719979 has 2 divisors, whose sum is σ = 212111719980. Its totient is φ = 212111719978.

The previous prime is 212111719951. The next prime is 212111719987. The reversal of 212111719979 is 979917111212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212111719979 is a prime.

It is not a weakly prime, because it can be changed into another prime (212111719279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055859989 + 106055859990.

It is an arithmetic number, because the mean of its divisors is an integer number (106055859990).

Almost surely, 2^212111719979 is an apocalyptic number.

212111719979 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111719979 is an equidigital number, since it uses as much as digits as its factorization.

212111719979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 50.

The spelling of 212111719979 in words is "two hundred twelve billion, one hundred eleven million, seven hundred nineteen thousand, nine hundred seventy-nine".