142222321 has 2 divisors, whose sum is σ = 142222322. Its totient is φ = 142222320.

The previous prime is 142222319. The next prime is 142222343. The reversal of 142222321 is 123222241.

142222321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74390625 + 67831696 = 8625^2 + 8236^2 .

It is a cyclic number.

It is not a de Polignac number, because 142222321 - 2¹ = 142222319 is a prime.

Together with 142222319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142222021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71111160 + 71111161.

It is an arithmetic number, because the mean of its divisors is an integer number (71111161).

Almost surely, 2^142222321 is an apocalyptic number.

It is an amenable number.

142222321 is a deficient number, since it is larger than the sum of its proper divisors (1).

142222321 is an equidigital number, since it uses as much as digits as its factorization.

142222321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 142222321 is about 11925.7000213824. The cubic root of 142222321 is about 521.9824730002.

Adding to 142222321 its reverse (123222241), we get a palindrome (265444562).

The spelling of 142222321 in words is "one hundred forty-two million, two hundred twenty-two thousand, three hundred twenty-one".