142200221 has 2 divisors, whose sum is σ = 142200222. Its totient is φ = 142200220.

The previous prime is 142200209. The next prime is 142200229. The reversal of 142200221 is 122002241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131928196 + 10272025 = 11486^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 142200221 - 2¹⁸ = 141938077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142200196 and 142200205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142200229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71100110 + 71100111.

It is an arithmetic number, because the mean of its divisors is an integer number (71100111).

Almost surely, 2^142200221 is an apocalyptic number.

It is an amenable number.

142200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142200221 is an equidigital number, since it uses as much as digits as its factorization.

142200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 142200221 is about 11924.7734150381. The cubic root of 142200221 is about 521.9554345575.

Adding to 142200221 its reverse (122002241), we get a palindrome (264202462).

The spelling of 142200221 in words is "one hundred forty-two million, two hundred thousand, two hundred twenty-one".