142423222021 has 2 divisors, whose sum is σ = 142423222022. Its totient is φ = 142423222020.

The previous prime is 142423222003. The next prime is 142423222031. The reversal of 142423222021 is 120222324241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117022831396 + 25400390625 = 342086^2 + 159375^2 .

It is an emirp because it is prime and its reverse (120222324241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142423222021 - 2¹⁷ = 142423090949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142423222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71211611010 + 71211611011.

It is an arithmetic number, because the mean of its divisors is an integer number (71211611011).

Almost surely, 2^142423222021 is an apocalyptic number.

It is an amenable number.

142423222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142423222021 is an equidigital number, since it uses as much as digits as its factorization.

142423222021 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 142423222021 its reverse (120222324241), we get a palindrome (262645546262).

The spelling of 142423222021 in words is "one hundred forty-two billion, four hundred twenty-three million, two hundred twenty-two thousand, twenty-one".