2021111585879 has 2 divisors, whose sum is σ = 2021111585880. Its totient is φ = 2021111585878.

The previous prime is 2021111585863. The next prime is 2021111585897. The reversal of 2021111585879 is 9785851111202.

It is a happy number.

Together with next prime (2021111585897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021111585879 - 2⁴ = 2021111585863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021111585809) 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, 1010555792939 + 1010555792940.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555792940).

Almost surely, 2^{2021111585879} is an apocalyptic number.

2021111585879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021111585879 is an equidigital number, since it uses as much as digits as its factorization.

2021111585879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 50.

The spelling of 2021111585879 in words is "two trillion, twenty-one billion, one hundred eleven million, five hundred eighty-five thousand, eight hundred seventy-nine".