142821530321 has 4 divisors (see below), whose sum is σ = 144131819700. Its totient is φ = 141511240944.

The previous prime is 142821530263. The next prime is 142821530323. The reversal of 142821530321 is 123035128241.

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 112601184721 + 30220345600 = 335561^2 + 173840^2 .

It is a cyclic number.

It is not a de Polignac number, because 142821530321 - 2¹⁴ = 142821513937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142821530323) 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, 655144526 + ... + 655144743.

It is an arithmetic number, because the mean of its divisors is an integer number (36032954925).

Almost surely, 2^142821530321 is an apocalyptic number.

It is an amenable number.

142821530321 is a deficient number, since it is larger than the sum of its proper divisors (1310289379).

142821530321 is a wasteful number, since it uses less digits than its factorization.

142821530321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310289378.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 142821530321 its reverse (123035128241), we get a palindrome (265856658562).

The spelling of 142821530321 in words is "one hundred forty-two billion, eight hundred twenty-one million, five hundred thirty thousand, three hundred twenty-one".