142303143221 has 4 divisors (see below), whose sum is σ = 142338821100. Its totient is φ = 142267465344.

The previous prime is 142303143217. The next prime is 142303143239. The reversal of 142303143221 is 122341303241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32403600100 + 109899543121 = 180010^2 + 331511^2 .

It is a cyclic number.

It is not a de Polignac number, because 142303143221 - 2² = 142303143217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142303143121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17832956 + ... + 17840933.

It is an arithmetic number, because the mean of its divisors is an integer number (35584705275).

Almost surely, 2^142303143221 is an apocalyptic number.

It is an amenable number.

142303143221 is a deficient number, since it is larger than the sum of its proper divisors (35677879).

142303143221 is an equidigital number, since it uses as much as digits as its factorization.

142303143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35677878.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 142303143221 its reverse (122341303241), we get a palindrome (264644446462).

The spelling of 142303143221 in words is "one hundred forty-two billion, three hundred three million, one hundred forty-three thousand, two hundred twenty-one".