212121111079 has 2 divisors, whose sum is σ = 212121111080. Its totient is φ = 212121111078.

The previous prime is 212121111077. The next prime is 212121111107. The reversal of 212121111079 is 970111121212.

212121111079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (212121111107) can be obtained adding 212121111079 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121111079 - 2¹ = 212121111077 is a prime.

Together with 212121111077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212121111077) 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, 106060555539 + 106060555540.

It is an arithmetic number, because the mean of its divisors is an integer number (106060555540).

Almost surely, 2^212121111079 is an apocalyptic number.

212121111079 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121111079 is an equidigital number, since it uses as much as digits as its factorization.

212121111079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 212121111079 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, seventy-nine".