84661222141 has 2 divisors, whose sum is σ = 84661222142. Its totient is φ = 84661222140.

The previous prime is 84661222127. The next prime is 84661222189. The reversal of 84661222141 is 14122216648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78798104100 + 5863118041 = 280710^2 + 76571^2 .

It is a cyclic number.

It is not a de Polignac number, because 84661222141 - 2⁹ = 84661221629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84661222141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84661222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42330611070 + 42330611071.

It is an arithmetic number, because the mean of its divisors is an integer number (42330611071).

Almost surely, 2^84661222141 is an apocalyptic number.

It is an amenable number.

84661222141 is a deficient number, since it is larger than the sum of its proper divisors (1).

84661222141 is an equidigital number, since it uses as much as digits as its factorization.

84661222141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

Adding to 84661222141 its reverse (14122216648), we get a palindrome (98783438789).

The spelling of 84661222141 in words is "eighty-four billion, six hundred sixty-one million, two hundred twenty-two thousand, one hundred forty-one".