842924733221 has 2 divisors, whose sum is σ = 842924733222. Its totient is φ = 842924733220.

The previous prime is 842924733139. The next prime is 842924733251. The reversal of 842924733221 is 122337429248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781254460996 + 61670272225 = 883886^2 + 248335^2 .

It is a cyclic number.

It is not a de Polignac number, because 842924733221 - 2¹⁰ = 842924732197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842924733251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421462366610 + 421462366611.

It is an arithmetic number, because the mean of its divisors is an integer number (421462366611).

Almost surely, 2^842924733221 is an apocalyptic number.

It is an amenable number.

842924733221 is a deficient number, since it is larger than the sum of its proper divisors (1).

842924733221 is an equidigital number, since it uses as much as digits as its factorization.

842924733221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The spelling of 842924733221 in words is "eight hundred forty-two billion, nine hundred twenty-four million, seven hundred thirty-three thousand, two hundred twenty-one".