142221323 has 2 divisors, whose sum is σ = 142221324. Its totient is φ = 142221322.

The previous prime is 142221311. The next prime is 142221349. The reversal of 142221323 is 323122241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142221323 - 2²⁰ = 141172747 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 142221295 and 142221304.

It is not a weakly prime, because it can be changed into another prime (142221353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71110661 + 71110662.

It is an arithmetic number, because the mean of its divisors is an integer number (71110662).

Almost surely, 2^142221323 is an apocalyptic number.

142221323 is a deficient number, since it is larger than the sum of its proper divisors (1).

142221323 is an equidigital number, since it uses as much as digits as its factorization.

142221323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 142221323 is about 11925.6581789015. The cubic root of 142221323 is about 521.9812520485.

Adding to 142221323 its reverse (323122241), we get a palindrome (465343564).

The spelling of 142221323 in words is "one hundred forty-two million, two hundred twenty-one thousand, three hundred twenty-three".