201442420061 has 2 divisors, whose sum is σ = 201442420062. Its totient is φ = 201442420060.

The previous prime is 201442420019. The next prime is 201442420079. The reversal of 201442420061 is 160024244102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128320851961 + 73121568100 = 358219^2 + 270410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201442420061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201442420061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201442422061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100721210030 + 100721210031.

It is an arithmetic number, because the mean of its divisors is an integer number (100721210031).

Almost surely, 2^201442420061 is an apocalyptic number.

It is an amenable number.

201442420061 is a deficient number, since it is larger than the sum of its proper divisors (1).

201442420061 is an equidigital number, since it uses as much as digits as its factorization.

201442420061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 201442420061 its reverse (160024244102), we get a palindrome (361466664163).

The spelling of 201442420061 in words is "two hundred one billion, four hundred forty-two million, four hundred twenty thousand, sixty-one".