201442142009 has 2 divisors, whose sum is σ = 201442142010. Its totient is φ = 201442142008.

The previous prime is 201442141963. The next prime is 201442142047. The reversal of 201442142009 is 900241244102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101493216400 + 99948925609 = 318580^2 + 316147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201442142009 is a prime.

It is not a weakly prime, because it can be changed into another prime (201442142059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100721071004 + 100721071005.

It is an arithmetic number, because the mean of its divisors is an integer number (100721071005).

Almost surely, 2^201442142009 is an apocalyptic number.

It is an amenable number.

201442142009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201442142009 is an equidigital number, since it uses as much as digits as its factorization.

201442142009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 201442142009 in words is "two hundred one billion, four hundred forty-two million, one hundred forty-two thousand, nine".