142224141221 has 2 divisors, whose sum is σ = 142224141222. Its totient is φ = 142224141220.

The previous prime is 142224141217. The next prime is 142224141281. The reversal of 142224141221 is 122141422241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90519748225 + 51704392996 = 300865^2 + 227386^2 .

It is a cyclic number.

It is not a de Polignac number, because 142224141221 - 2² = 142224141217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142224141281) 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, 71112070610 + 71112070611.

It is an arithmetic number, because the mean of its divisors is an integer number (71112070611).

Almost surely, 2^142224141221 is an apocalyptic number.

It is an amenable number.

142224141221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142224141221 is an equidigital number, since it uses as much as digits as its factorization.

142224141221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 26.

Adding to 142224141221 its reverse (122141422241), we get a palindrome (264365563462).

The spelling of 142224141221 in words is "one hundred forty-two billion, two hundred twenty-four million, one hundred forty-one thousand, two hundred twenty-one".