42142230151321 has 4 divisors (see below), whose sum is σ = 42385826857572. Its totient is φ = 41898633445072.

The previous prime is 42142230151291. The next prime is 42142230151331. The reversal of 42142230151321 is 12315103224124.

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 16158631248400 + 25983598902921 = 4019780^2 + 5097411^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142230151321 - 2¹¹ = 42142230149273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42142230151331) 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, 121798352866 + ... + 121798353211.

It is an arithmetic number, because the mean of its divisors is an integer number (10596456714393).

Almost surely, 2^{42142230151321} is an apocalyptic number.

It is an amenable number.

42142230151321 is a deficient number, since it is larger than the sum of its proper divisors (243596706251).

42142230151321 is a wasteful number, since it uses less digits than its factorization.

42142230151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243596706250.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 42142230151321 its reverse (12315103224124), we get a palindrome (54457333375445).

The spelling of 42142230151321 in words is "forty-two trillion, one hundred forty-two billion, two hundred thirty million, one hundred fifty-one thousand, three hundred twenty-one".