2021111205079 has 2 divisors, whose sum is σ = 2021111205080. Its totient is φ = 2021111205078.

The previous prime is 2021111205077. The next prime is 2021111205103. The reversal of 2021111205079 is 9705021111202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021111205079 - 2¹ = 2021111205077 is a prime.

Together with 2021111205077, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2021111205079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021111205077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555602539 + 1010555602540.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555602540).

Almost surely, 2^{2021111205079} is an apocalyptic number.

2021111205079 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021111205079 is an equidigital number, since it uses as much as digits as its factorization.

2021111205079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 2021111205079 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred five thousand, seventy-nine".