142043442221 has 2 divisors, whose sum is σ = 142043442222. Its totient is φ = 142043442220.

The previous prime is 142043442197. The next prime is 142043442263. The reversal of 142043442221 is 122244340241.

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., 107721804100 + 34321638121 = 328210^2 + 185261^2 .

It is a cyclic number.

It is not a de Polignac number, because 142043442221 - 2³⁰ = 140969700397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142043442271) 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, 71021721110 + 71021721111.

It is an arithmetic number, because the mean of its divisors is an integer number (71021721111).

Almost surely, 2^142043442221 is an apocalyptic number.

It is an amenable number.

142043442221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142043442221 is an equidigital number, since it uses as much as digits as its factorization.

142043442221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 142043442221 its reverse (122244340241), we get a palindrome (264287782462).

The spelling of 142043442221 in words is "one hundred forty-two billion, forty-three million, four hundred forty-two thousand, two hundred twenty-one".