142224032221 has 2 divisors, whose sum is σ = 142224032222. Its totient is φ = 142224032220.

The previous prime is 142224032213. The next prime is 142224032227. The reversal of 142224032221 is 122230422241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139573224025 + 2650808196 = 373595^2 + 51486^2 .

It is a cyclic number.

It is not a de Polignac number, because 142224032221 - 2³ = 142224032213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142224032227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71112016110 + 71112016111.

It is an arithmetic number, because the mean of its divisors is an integer number (71112016111).

Almost surely, 2^142224032221 is an apocalyptic number.

It is an amenable number.

142224032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142224032221 is an equidigital number, since it uses as much as digits as its factorization.

142224032221 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 25.

Adding to 142224032221 its reverse (122230422241), we get a palindrome (264454454462).

The spelling of 142224032221 in words is "one hundred forty-two billion, two hundred twenty-four million, thirty-two thousand, two hundred twenty-one".