2942705221 has 2 divisors, whose sum is σ = 2942705222. Its totient is φ = 2942705220.

The previous prime is 2942705179. The next prime is 2942705281. The reversal of 2942705221 is 1225072492.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2880468900 + 62236321 = 53670^2 + 7889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2942705221 - 2⁷ = 2942705093 is a prime.

It is a super-3 number, since 3×2942705221³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2942705281) 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, 1471352610 + 1471352611.

It is an arithmetic number, because the mean of its divisors is an integer number (1471352611).

Almost surely, 2^2942705221 is an apocalyptic number.

It is an amenable number.

2942705221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2942705221 is an equidigital number, since it uses as much as digits as its factorization.

2942705221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 2942705221 is about 54246.7070060478. The cubic root of 2942705221 is about 1433.0090064035.

The spelling of 2942705221 in words is "two billion, nine hundred forty-two million, seven hundred five thousand, two hundred twenty-one".