442010212009 has 2 divisors, whose sum is σ = 442010212010. Its totient is φ = 442010212008.

The previous prime is 442010212001. The next prime is 442010212057. The reversal of 442010212009 is 900212010244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337258947600 + 104751264409 = 580740^2 + 323653^2 .

It is a cyclic number.

It is not a de Polignac number, because 442010212009 - 2³ = 442010212001 is a prime.

It is a super-2 number, since 2×442010212009² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442010212001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221005106004 + 221005106005.

It is an arithmetic number, because the mean of its divisors is an integer number (221005106005).

Almost surely, 2^442010212009 is an apocalyptic number.

It is an amenable number.

442010212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

442010212009 is an equidigital number, since it uses as much as digits as its factorization.

442010212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 442010212009 in words is "four hundred forty-two billion, ten million, two hundred twelve thousand, nine".