7042673221 has 2 divisors, whose sum is σ = 7042673222. Its totient is φ = 7042673220.

The previous prime is 7042673219. The next prime is 7042673233. The reversal of 7042673221 is 1223762407.

7042673221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5932850625 + 1109822596 = 77025^2 + 33314^2 .

It is a cyclic number.

It is not a de Polignac number, because 7042673221 - 2¹ = 7042673219 is a prime.

Together with 7042673219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7042673821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521336610 + 3521336611.

It is an arithmetic number, because the mean of its divisors is an integer number (3521336611).

Almost surely, 2^7042673221 is an apocalyptic number.

It is an amenable number.

7042673221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042673221 is an equidigital number, since it uses as much as digits as its factorization.

7042673221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 7042673221 is about 83920.6364430108. The cubic root of 7042673221 is about 1916.8104978121.

The spelling of 7042673221 in words is "seven billion, forty-two million, six hundred seventy-three thousand, two hundred twenty-one".