2042686221971 has 2 divisors, whose sum is σ = 2042686221972. Its totient is φ = 2042686221970.

The previous prime is 2042686221943. The next prime is 2042686222061. The reversal of 2042686221971 is 1791226862402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2042686221971 - 2¹⁸ = 2042685959827 is a prime.

It is not a weakly prime, because it can be changed into another prime (2042686221911) 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, 1021343110985 + 1021343110986.

It is an arithmetic number, because the mean of its divisors is an integer number (1021343110986).

Almost surely, 2^{2042686221971} is an apocalyptic number.

2042686221971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042686221971 is an equidigital number, since it uses as much as digits as its factorization.

2042686221971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 2042686221971 in words is "two trillion, forty-two billion, six hundred eighty-six million, two hundred twenty-one thousand, nine hundred seventy-one".