999420084101 has 2 divisors, whose sum is σ = 999420084102. Its totient is φ = 999420084100.

The previous prime is 999420084079. The next prime is 999420084119. The reversal of 999420084101 is 101480024999.

It is a Cunningham number, because it is equal to 999710²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999420084100 + 1 = 999710^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 999420084101 - 2⁶ = 999420084037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999420084181) 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, 499710042050 + 499710042051.

It is an arithmetic number, because the mean of its divisors is an integer number (499710042051).

Almost surely, 2^999420084101 is an apocalyptic number.

It is an amenable number.

999420084101 is a deficient number, since it is larger than the sum of its proper divisors (1).

999420084101 is an equidigital number, since it uses as much as digits as its factorization.

999420084101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 999420084101 in words is "nine hundred ninety-nine billion, four hundred twenty million, eighty-four thousand, one hundred one".