142402220321 has 4 divisors (see below), whose sum is σ = 142471249152. Its totient is φ = 142333191492.

The previous prime is 142402220287. The next prime is 142402220327. The reversal of 142402220321 is 123022204241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123022204241 = 39443 ⋅3118987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142402220321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142402220327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34511321 + ... + 34515446.

It is an arithmetic number, because the mean of its divisors is an integer number (35617812288).

Almost surely, 2^142402220321 is an apocalyptic number.

It is an amenable number.

142402220321 is a deficient number, since it is larger than the sum of its proper divisors (69028831).

142402220321 is an equidigital number, since it uses as much as digits as its factorization.

142402220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69028830.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 142402220321 its reverse (123022204241), we get a palindrome (265424424562).

The spelling of 142402220321 in words is "one hundred forty-two billion, four hundred two million, two hundred twenty thousand, three hundred twenty-one".